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2a1ee410 RH |
1 | /* Subroutines needed for unwinding IA-64 standard format stack frame |
2 | info for exception handling. | |
a5544970 | 3 | Copyright (C) 1997-2019 Free Software Foundation, Inc. |
2a1ee410 RH |
4 | Contributed by Andrew MacLeod <amacleod@cygnus.com> |
5 | Andrew Haley <aph@cygnus.com> | |
6 | David Mosberger-Tang <davidm@hpl.hp.com> | |
7 | ||
3bed2930 | 8 | This file is part of GCC. |
2a1ee410 | 9 | |
3bed2930 | 10 | GCC is free software; you can redistribute it and/or modify |
2a1ee410 | 11 | it under the terms of the GNU General Public License as published by |
748086b7 | 12 | the Free Software Foundation; either version 3, or (at your option) |
2a1ee410 RH |
13 | any later version. |
14 | ||
3bed2930 | 15 | GCC is distributed in the hope that it will be useful, |
2a1ee410 RH |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
748086b7 JJ |
20 | Under Section 7 of GPL version 3, you are granted additional |
21 | permissions described in the GCC Runtime Library Exception, version | |
22 | 3.1, as published by the Free Software Foundation. | |
2a1ee410 | 23 | |
748086b7 JJ |
24 | You should have received a copy of the GNU General Public License and |
25 | a copy of the GCC Runtime Library Exception along with this program; | |
26 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
27 | <http://www.gnu.org/licenses/>. */ | |
2a1ee410 RH |
28 | |
29 | #include "tconfig.h" | |
30 | #include "tsystem.h" | |
07938cec HB |
31 | #include "coretypes.h" |
32 | #include "tm.h" | |
852b75ed | 33 | #include "libgcc_tm.h" |
2a1ee410 RH |
34 | #include "unwind.h" |
35 | #include "unwind-ia64.h" | |
443728bb | 36 | #include "unwind-compat.h" |
72e32876 RH |
37 | #include "ia64intrin.h" |
38 | ||
39 | /* This isn't thread safe, but nice for occasional tests. */ | |
40 | #undef ENABLE_MALLOC_CHECKING | |
2a1ee410 | 41 | |
0d24f4d1 | 42 | #ifndef __USING_SJLJ_EXCEPTIONS__ |
8662eb14 | 43 | |
2a1ee410 RH |
44 | enum unw_application_register |
45 | { | |
46 | UNW_AR_BSP, | |
47 | UNW_AR_BSPSTORE, | |
48 | UNW_AR_PFS, | |
49 | UNW_AR_RNAT, | |
50 | UNW_AR_UNAT, | |
51 | UNW_AR_LC, | |
52 | UNW_AR_EC, | |
53 | UNW_AR_FPSR, | |
54 | UNW_AR_RSC, | |
55 | UNW_AR_CCV | |
56 | }; | |
57 | ||
58 | enum unw_register_index | |
59 | { | |
60 | /* Primary UNAT. */ | |
61 | UNW_REG_PRI_UNAT_GR, | |
62 | UNW_REG_PRI_UNAT_MEM, | |
63 | ||
64 | /* Memory Stack. */ | |
65 | UNW_REG_PSP, /* previous memory stack pointer */ | |
66 | ||
67 | /* Register Stack. */ | |
68 | UNW_REG_BSP, /* register stack pointer */ | |
69 | UNW_REG_BSPSTORE, | |
70 | UNW_REG_PFS, /* previous function state */ | |
71 | UNW_REG_RNAT, | |
72 | /* Return Pointer. */ | |
73 | UNW_REG_RP, | |
74 | ||
75 | /* Special preserved registers. */ | |
76 | UNW_REG_UNAT, UNW_REG_PR, UNW_REG_LC, UNW_REG_FPSR, | |
77 | ||
78 | /* Non-stacked general registers. */ | |
79 | UNW_REG_R2, | |
80 | UNW_REG_R4 = UNW_REG_R2 + 2, | |
81 | UNW_REG_R7 = UNW_REG_R2 + 5, | |
82 | UNW_REG_R31 = UNW_REG_R2 + 29, | |
83 | ||
84 | /* Non-stacked floating point registers. */ | |
85 | UNW_REG_F2, | |
86 | UNW_REG_F5 = UNW_REG_F2 + 3, | |
87 | UNW_REG_F16 = UNW_REG_F2 + 14, | |
88 | UNW_REG_F31 = UNW_REG_F2 + 29, | |
89 | ||
90 | /* Branch registers. */ | |
443621af | 91 | UNW_REG_B0, UNW_REG_B1, |
2a1ee410 RH |
92 | UNW_REG_B5 = UNW_REG_B1 + 4, |
93 | ||
94 | UNW_NUM_REGS | |
95 | }; | |
96 | ||
97 | enum unw_where | |
98 | { | |
99 | UNW_WHERE_NONE, /* register isn't saved at all */ | |
100 | UNW_WHERE_GR, /* register is saved in a general register */ | |
101 | UNW_WHERE_FR, /* register is saved in a floating-point register */ | |
102 | UNW_WHERE_BR, /* register is saved in a branch register */ | |
103 | UNW_WHERE_SPREL, /* register is saved on memstack (sp-relative) */ | |
104 | UNW_WHERE_PSPREL, /* register is saved on memstack (psp-relative) */ | |
105 | ||
106 | /* At the end of each prologue these locations get resolved to | |
107 | UNW_WHERE_PSPREL and UNW_WHERE_GR, respectively. */ | |
108 | UNW_WHERE_SPILL_HOME, /* register is saved in its spill home */ | |
109 | UNW_WHERE_GR_SAVE /* register is saved in next general register */ | |
110 | }; | |
111 | ||
112 | #define UNW_WHEN_NEVER 0x7fffffff | |
113 | ||
114 | struct unw_reg_info | |
115 | { | |
9e916de7 | 116 | unw_word val; /* save location: register number or offset */ |
2a1ee410 RH |
117 | enum unw_where where; /* where the register gets saved */ |
118 | int when; /* when the register gets saved */ | |
119 | }; | |
120 | ||
5025a549 | 121 | struct unw_reg_state { |
9e916de7 TG |
122 | struct unw_reg_state *next; /* next (outer) element on state stack */ |
123 | struct unw_reg_info reg[UNW_NUM_REGS]; /* register save locations */ | |
5025a549 DM |
124 | }; |
125 | ||
126 | struct unw_labeled_state { | |
9e916de7 TG |
127 | struct unw_labeled_state *next; /* next labeled state (or NULL) */ |
128 | unw_word label; /* label for this state */ | |
129 | struct unw_reg_state saved_state; | |
5025a549 DM |
130 | }; |
131 | ||
2a1ee410 RH |
132 | typedef struct unw_state_record |
133 | { | |
134 | unsigned int first_region : 1; /* is this the first region? */ | |
135 | unsigned int done : 1; /* are we done scanning descriptors? */ | |
136 | unsigned int any_spills : 1; /* got any register spills? */ | |
9e916de7 | 137 | unsigned int in_body : 1; /* are we inside a body? */ |
d7e60e95 | 138 | unsigned int no_reg_stack_frame : 1; /* Don't adjust bsp for i&l regs */ |
9e916de7 TG |
139 | unsigned char *imask; /* imask of spill_mask record or NULL */ |
140 | unw_word pr_val; /* predicate values */ | |
141 | unw_word pr_mask; /* predicate mask */ | |
142 | unw_sword spill_offset; /* psp-relative offset for spill base */ | |
2a1ee410 RH |
143 | int region_start; |
144 | int region_len; | |
145 | int epilogue_start; | |
146 | int epilogue_count; | |
147 | int when_target; | |
148 | ||
149 | unsigned char gr_save_loc; /* next general register to use for saving */ | |
150 | unsigned char return_link_reg; /* branch register for return link */ | |
3950dcdf | 151 | unsigned short unwabi; |
2a1ee410 | 152 | |
5025a549 DM |
153 | struct unw_labeled_state *labeled_states; /* list of all labeled states */ |
154 | struct unw_reg_state curr; /* current state */ | |
2a1ee410 RH |
155 | |
156 | _Unwind_Personality_Fn personality; | |
157 | ||
158 | } _Unwind_FrameState; | |
159 | ||
160 | enum unw_nat_type | |
161 | { | |
162 | UNW_NAT_NONE, /* NaT not represented */ | |
163 | UNW_NAT_VAL, /* NaT represented by NaT value (fp reg) */ | |
164 | UNW_NAT_MEMSTK, /* NaT value is in unat word at offset OFF */ | |
165 | UNW_NAT_REGSTK /* NaT is in rnat */ | |
166 | }; | |
167 | ||
168 | struct unw_stack | |
169 | { | |
9e916de7 TG |
170 | unw_word limit; |
171 | unw_word top; | |
2a1ee410 RH |
172 | }; |
173 | ||
174 | struct _Unwind_Context | |
175 | { | |
176 | /* Initial frame info. */ | |
9e916de7 TG |
177 | unw_word rnat; /* rse nat collection */ |
178 | unw_word regstk_top; /* lowest address of rbs stored register | |
179 | which uses context->rnat collection */ | |
2a1ee410 RH |
180 | |
181 | /* Current frame info. */ | |
9e916de7 TG |
182 | unw_word bsp; /* backing store pointer value |
183 | corresponding to psp. */ | |
184 | unw_word sp; /* stack pointer value */ | |
185 | unw_word psp; /* previous sp value */ | |
186 | unw_word rp; /* return pointer */ | |
187 | unw_word pr; /* predicate collection */ | |
2a1ee410 | 188 | |
9e916de7 TG |
189 | unw_word region_start;/* start of unwind region */ |
190 | unw_word gp; /* global pointer value */ | |
191 | void *lsda; /* language specific data area */ | |
2a1ee410 RH |
192 | |
193 | /* Preserved state. */ | |
9e916de7 TG |
194 | unw_word *bsp_loc; /* previous bsp save location |
195 | Appears to be write-only? */ | |
196 | unw_word *bspstore_loc; | |
197 | unw_word *pfs_loc; /* Save location for pfs in current | |
198 | (corr. to sp) frame. Target | |
199 | contains cfm for caller. */ | |
200 | unw_word *signal_pfs_loc;/* Save location for pfs in current | |
201 | signal frame. Target contains | |
202 | pfs for caller. */ | |
203 | unw_word *pri_unat_loc; | |
204 | unw_word *unat_loc; | |
205 | unw_word *lc_loc; | |
206 | unw_word *fpsr_loc; | |
207 | ||
208 | unw_word eh_data[4]; | |
2a1ee410 RH |
209 | |
210 | struct unw_ireg | |
211 | { | |
9e916de7 | 212 | unw_word *loc; |
2a1ee410 RH |
213 | struct unw_ireg_nat |
214 | { | |
215 | enum unw_nat_type type : 3; | |
9e916de7 | 216 | unw_sword off : 61; /* NaT word is at loc+nat.off */ |
2a1ee410 | 217 | } nat; |
4d9720f0 | 218 | } ireg[32 - 2]; /* Indexed by <register number> - 2 */ |
2a1ee410 | 219 | |
9e916de7 | 220 | unw_word *br_loc[8]; |
2a1ee410 | 221 | void *fr_loc[32 - 2]; |
4d9720f0 HB |
222 | |
223 | /* ??? We initially point pri_unat_loc here. The entire NAT bit | |
224 | logic needs work. */ | |
9e916de7 | 225 | unw_word initial_unat; |
2a1ee410 RH |
226 | }; |
227 | ||
2a1ee410 RH |
228 | /* Implicit register save order. See section 11.4.2.3 Rules for Using |
229 | Unwind Descriptors, rule 3. */ | |
230 | ||
231 | static unsigned char const save_order[] = | |
232 | { | |
233 | UNW_REG_RP, UNW_REG_PFS, UNW_REG_PSP, UNW_REG_PR, | |
234 | UNW_REG_UNAT, UNW_REG_LC, UNW_REG_FPSR, UNW_REG_PRI_UNAT_GR | |
235 | }; | |
236 | ||
237 | \f | |
238 | #define MIN(X, Y) ((X) < (Y) ? (X) : (Y)) | |
239 | ||
72e32876 RH |
240 | /* MASK is a bitmap describing the allocation state of emergency buffers, |
241 | with bit set indicating free. Return >= 0 if allocation is successful; | |
242 | < 0 if failure. */ | |
2a1ee410 | 243 | |
72e32876 RH |
244 | static inline int |
245 | atomic_alloc (unsigned int *mask) | |
246 | { | |
247 | unsigned int old = *mask, ret, new; | |
248 | ||
249 | while (1) | |
250 | { | |
251 | if (old == 0) | |
252 | return -1; | |
253 | ret = old & -old; | |
254 | new = old & ~ret; | |
255 | new = __sync_val_compare_and_swap (mask, old, new); | |
256 | if (old == new) | |
257 | break; | |
258 | old = new; | |
259 | } | |
260 | ||
261 | return __builtin_ffs (ret) - 1; | |
262 | } | |
263 | ||
264 | /* Similarly, free an emergency buffer. */ | |
265 | ||
266 | static inline void | |
267 | atomic_free (unsigned int *mask, int bit) | |
268 | { | |
269 | __sync_xor_and_fetch (mask, 1 << bit); | |
270 | } | |
271 | ||
272 | ||
273 | #define SIZE(X) (sizeof(X) / sizeof(*(X))) | |
274 | #define MASK_FOR(X) ((2U << (SIZE (X) - 1)) - 1) | |
275 | #define PTR_IN(X, P) ((P) >= (X) && (P) < (X) + SIZE (X)) | |
276 | ||
277 | static struct unw_reg_state emergency_reg_state[32]; | |
8f6c5889 | 278 | static unsigned int emergency_reg_state_free = MASK_FOR (emergency_reg_state); |
72e32876 RH |
279 | |
280 | static struct unw_labeled_state emergency_labeled_state[8]; | |
8f6c5889 | 281 | static unsigned int emergency_labeled_state_free = MASK_FOR (emergency_labeled_state); |
72e32876 RH |
282 | |
283 | #ifdef ENABLE_MALLOC_CHECKING | |
284 | static int reg_state_alloced; | |
285 | static int labeled_state_alloced; | |
286 | #endif | |
287 | ||
288 | /* Allocation and deallocation of structures. */ | |
289 | ||
290 | static struct unw_reg_state * | |
291 | alloc_reg_state (void) | |
2a1ee410 RH |
292 | { |
293 | struct unw_reg_state *rs; | |
294 | ||
72e32876 RH |
295 | #ifdef ENABLE_MALLOC_CHECKING |
296 | reg_state_alloced++; | |
297 | #endif | |
298 | ||
2a1ee410 | 299 | rs = malloc (sizeof (struct unw_reg_state)); |
72e32876 RH |
300 | if (!rs) |
301 | { | |
302 | int n = atomic_alloc (&emergency_reg_state_free); | |
303 | if (n >= 0) | |
304 | rs = &emergency_reg_state[n]; | |
305 | } | |
306 | ||
307 | return rs; | |
308 | } | |
309 | ||
310 | static void | |
311 | free_reg_state (struct unw_reg_state *rs) | |
312 | { | |
313 | #ifdef ENABLE_MALLOC_CHECKING | |
314 | reg_state_alloced--; | |
315 | #endif | |
316 | ||
317 | if (PTR_IN (emergency_reg_state, rs)) | |
318 | atomic_free (&emergency_reg_state_free, rs - emergency_reg_state); | |
319 | else | |
320 | free (rs); | |
321 | } | |
322 | ||
323 | static struct unw_labeled_state * | |
324 | alloc_label_state (void) | |
325 | { | |
326 | struct unw_labeled_state *ls; | |
327 | ||
328 | #ifdef ENABLE_MALLOC_CHECKING | |
329 | labeled_state_alloced++; | |
330 | #endif | |
331 | ||
332 | ls = malloc(sizeof(struct unw_labeled_state)); | |
333 | if (!ls) | |
334 | { | |
335 | int n = atomic_alloc (&emergency_labeled_state_free); | |
336 | if (n >= 0) | |
337 | ls = &emergency_labeled_state[n]; | |
338 | } | |
339 | ||
340 | return ls; | |
341 | } | |
342 | ||
343 | static void | |
344 | free_label_state (struct unw_labeled_state *ls) | |
345 | { | |
346 | #ifdef ENABLE_MALLOC_CHECKING | |
347 | labeled_state_alloced--; | |
348 | #endif | |
349 | ||
350 | if (PTR_IN (emergency_labeled_state, ls)) | |
351 | atomic_free (&emergency_labeled_state_free, emergency_labeled_state - ls); | |
352 | else | |
353 | free (ls); | |
354 | } | |
355 | ||
356 | /* Routines to manipulate the state stack. */ | |
357 | ||
358 | static void | |
359 | push (struct unw_state_record *sr) | |
360 | { | |
361 | struct unw_reg_state *rs = alloc_reg_state (); | |
2a1ee410 | 362 | memcpy (rs, &sr->curr, sizeof (*rs)); |
5025a549 | 363 | sr->curr.next = rs; |
2a1ee410 RH |
364 | } |
365 | ||
366 | static void | |
367 | pop (struct unw_state_record *sr) | |
368 | { | |
5025a549 | 369 | struct unw_reg_state *rs = sr->curr.next; |
2a1ee410 | 370 | |
5025a549 | 371 | if (!rs) |
72e32876 RH |
372 | abort (); |
373 | memcpy (&sr->curr, rs, sizeof(*rs)); | |
374 | free_reg_state (rs); | |
2a1ee410 RH |
375 | } |
376 | ||
5025a549 | 377 | /* Make a copy of the state stack. Non-recursive to avoid stack overflows. */ |
72e32876 | 378 | |
5025a549 DM |
379 | static struct unw_reg_state * |
380 | dup_state_stack (struct unw_reg_state *rs) | |
381 | { | |
382 | struct unw_reg_state *copy, *prev = NULL, *first = NULL; | |
383 | ||
384 | while (rs) | |
385 | { | |
72e32876 RH |
386 | copy = alloc_reg_state (); |
387 | memcpy (copy, rs, sizeof(*copy)); | |
5025a549 DM |
388 | if (first) |
389 | prev->next = copy; | |
390 | else | |
391 | first = copy; | |
392 | rs = rs->next; | |
393 | prev = copy; | |
394 | } | |
72e32876 | 395 | |
5025a549 DM |
396 | return first; |
397 | } | |
398 | ||
399 | /* Free all stacked register states (but not RS itself). */ | |
400 | static void | |
401 | free_state_stack (struct unw_reg_state *rs) | |
402 | { | |
403 | struct unw_reg_state *p, *next; | |
404 | ||
405 | for (p = rs->next; p != NULL; p = next) | |
406 | { | |
407 | next = p->next; | |
72e32876 | 408 | free_reg_state (p); |
5025a549 DM |
409 | } |
410 | rs->next = NULL; | |
411 | } | |
72e32876 RH |
412 | |
413 | /* Free all labeled states. */ | |
414 | ||
415 | static void | |
416 | free_label_states (struct unw_labeled_state *ls) | |
417 | { | |
418 | struct unw_labeled_state *next; | |
419 | ||
420 | for (; ls ; ls = next) | |
421 | { | |
422 | next = ls->next; | |
423 | ||
424 | free_state_stack (&ls->saved_state); | |
425 | free_label_state (ls); | |
426 | } | |
427 | } | |
5025a549 DM |
428 | \f |
429 | /* Unwind decoder routines */ | |
430 | ||
2a1ee410 RH |
431 | static enum unw_register_index __attribute__((const)) |
432 | decode_abreg (unsigned char abreg, int memory) | |
433 | { | |
434 | switch (abreg) | |
435 | { | |
b874a90d DR |
436 | #if TARGET_ABI_OPEN_VMS |
437 | /* OpenVMS Calling Standard specifies R3 - R31. */ | |
438 | case 0x03 ... 0x1f: return UNW_REG_R2 + (abreg - 0x02); | |
439 | #else | |
440 | /* Standard Intel ABI specifies GR 4 - 7. */ | |
2a1ee410 | 441 | case 0x04 ... 0x07: return UNW_REG_R4 + (abreg - 0x04); |
b874a90d | 442 | #endif |
2a1ee410 RH |
443 | case 0x22 ... 0x25: return UNW_REG_F2 + (abreg - 0x22); |
444 | case 0x30 ... 0x3f: return UNW_REG_F16 + (abreg - 0x30); | |
445 | case 0x41 ... 0x45: return UNW_REG_B1 + (abreg - 0x41); | |
446 | case 0x60: return UNW_REG_PR; | |
447 | case 0x61: return UNW_REG_PSP; | |
448 | case 0x62: return memory ? UNW_REG_PRI_UNAT_MEM : UNW_REG_PRI_UNAT_GR; | |
449 | case 0x63: return UNW_REG_RP; | |
450 | case 0x64: return UNW_REG_BSP; | |
451 | case 0x65: return UNW_REG_BSPSTORE; | |
452 | case 0x66: return UNW_REG_RNAT; | |
453 | case 0x67: return UNW_REG_UNAT; | |
454 | case 0x68: return UNW_REG_FPSR; | |
455 | case 0x69: return UNW_REG_PFS; | |
456 | case 0x6a: return UNW_REG_LC; | |
457 | default: | |
458 | abort (); | |
459 | } | |
460 | } | |
461 | ||
462 | static void | |
463 | set_reg (struct unw_reg_info *reg, enum unw_where where, | |
9e916de7 | 464 | int when, unw_word val) |
2a1ee410 RH |
465 | { |
466 | reg->val = val; | |
467 | reg->where = where; | |
468 | if (reg->when == UNW_WHEN_NEVER) | |
469 | reg->when = when; | |
470 | } | |
471 | ||
472 | static void | |
9e916de7 | 473 | alloc_spill_area (unw_word *offp, unw_word regsize, |
2a1ee410 RH |
474 | struct unw_reg_info *lo, struct unw_reg_info *hi) |
475 | { | |
476 | struct unw_reg_info *reg; | |
477 | ||
478 | for (reg = hi; reg >= lo; --reg) | |
479 | { | |
480 | if (reg->where == UNW_WHERE_SPILL_HOME) | |
481 | { | |
482 | reg->where = UNW_WHERE_PSPREL; | |
1d9ad0e0 RH |
483 | *offp -= regsize; |
484 | reg->val = *offp; | |
2a1ee410 RH |
485 | } |
486 | } | |
487 | } | |
488 | ||
489 | static inline void | |
490 | spill_next_when (struct unw_reg_info **regp, struct unw_reg_info *lim, | |
491 | unw_word t) | |
492 | { | |
493 | struct unw_reg_info *reg; | |
494 | ||
495 | for (reg = *regp; reg <= lim; ++reg) | |
496 | { | |
497 | if (reg->where == UNW_WHERE_SPILL_HOME) | |
498 | { | |
499 | reg->when = t; | |
500 | *regp = reg + 1; | |
501 | return; | |
502 | } | |
503 | } | |
504 | /* Excess spill. */ | |
505 | abort (); | |
506 | } | |
507 | ||
508 | static void | |
509 | finish_prologue (struct unw_state_record *sr) | |
510 | { | |
511 | struct unw_reg_info *reg; | |
9e916de7 | 512 | unw_word off; |
2a1ee410 RH |
513 | int i; |
514 | ||
515 | /* First, resolve implicit register save locations | |
516 | (see Section "11.4.2.3 Rules for Using Unwind Descriptors", rule 3). */ | |
517 | ||
72e32876 | 518 | for (i = 0; i < (int) sizeof (save_order); ++i) |
2a1ee410 RH |
519 | { |
520 | reg = sr->curr.reg + save_order[i]; | |
521 | if (reg->where == UNW_WHERE_GR_SAVE) | |
522 | { | |
523 | reg->where = UNW_WHERE_GR; | |
524 | reg->val = sr->gr_save_loc++; | |
525 | } | |
526 | } | |
527 | ||
528 | /* Next, compute when the fp, general, and branch registers get saved. | |
529 | This must come before alloc_spill_area() because we need to know | |
530 | which registers are spilled to their home locations. */ | |
531 | if (sr->imask) | |
532 | { | |
533 | static unsigned char const limit[3] = { | |
534 | UNW_REG_F31, UNW_REG_R7, UNW_REG_B5 | |
535 | }; | |
536 | ||
537 | unsigned char kind, mask = 0, *cp = sr->imask; | |
538 | int t; | |
539 | struct unw_reg_info *(regs[3]); | |
540 | ||
541 | regs[0] = sr->curr.reg + UNW_REG_F2; | |
542 | regs[1] = sr->curr.reg + UNW_REG_R4; | |
543 | regs[2] = sr->curr.reg + UNW_REG_B1; | |
544 | ||
545 | for (t = 0; t < sr->region_len; ++t) | |
546 | { | |
547 | if ((t & 3) == 0) | |
548 | mask = *cp++; | |
549 | kind = (mask >> 2*(3-(t & 3))) & 3; | |
550 | if (kind > 0) | |
72e32876 RH |
551 | spill_next_when (®s[kind - 1], sr->curr.reg + limit[kind - 1], |
552 | sr->region_start + t); | |
2a1ee410 RH |
553 | } |
554 | } | |
555 | ||
556 | /* Next, lay out the memory stack spill area. */ | |
557 | if (sr->any_spills) | |
558 | { | |
559 | off = sr->spill_offset; | |
72e32876 RH |
560 | alloc_spill_area (&off, 16, sr->curr.reg + UNW_REG_F2, |
561 | sr->curr.reg + UNW_REG_F31); | |
562 | alloc_spill_area (&off, 8, sr->curr.reg + UNW_REG_B1, | |
563 | sr->curr.reg + UNW_REG_B5); | |
564 | alloc_spill_area (&off, 8, sr->curr.reg + UNW_REG_R4, | |
565 | sr->curr.reg + UNW_REG_R7); | |
2a1ee410 RH |
566 | } |
567 | } | |
568 | ||
569 | /* | |
570 | * Region header descriptors. | |
571 | */ | |
572 | ||
573 | static void | |
574 | desc_prologue (int body, unw_word rlen, unsigned char mask, | |
575 | unsigned char grsave, struct unw_state_record *sr) | |
576 | { | |
577 | int i; | |
578 | ||
579 | if (!(sr->in_body || sr->first_region)) | |
72e32876 | 580 | finish_prologue (sr); |
2a1ee410 RH |
581 | sr->first_region = 0; |
582 | ||
583 | /* Check if we're done. */ | |
5025a549 | 584 | if (sr->when_target < sr->region_start + sr->region_len) |
2a1ee410 RH |
585 | { |
586 | sr->done = 1; | |
587 | return; | |
588 | } | |
589 | ||
590 | for (i = 0; i < sr->epilogue_count; ++i) | |
72e32876 RH |
591 | pop (sr); |
592 | ||
2a1ee410 RH |
593 | sr->epilogue_count = 0; |
594 | sr->epilogue_start = UNW_WHEN_NEVER; | |
595 | ||
596 | if (!body) | |
72e32876 | 597 | push (sr); |
2a1ee410 RH |
598 | |
599 | sr->region_start += sr->region_len; | |
600 | sr->region_len = rlen; | |
601 | sr->in_body = body; | |
602 | ||
603 | if (!body) | |
604 | { | |
605 | for (i = 0; i < 4; ++i) | |
606 | { | |
607 | if (mask & 0x8) | |
608 | set_reg (sr->curr.reg + save_order[i], UNW_WHERE_GR, | |
609 | sr->region_start + sr->region_len - 1, grsave++); | |
610 | mask <<= 1; | |
611 | } | |
612 | sr->gr_save_loc = grsave; | |
613 | sr->any_spills = 0; | |
614 | sr->imask = 0; | |
615 | sr->spill_offset = 0x10; /* default to psp+16 */ | |
616 | } | |
617 | } | |
618 | ||
619 | /* | |
620 | * Prologue descriptors. | |
621 | */ | |
622 | ||
623 | static inline void | |
3950dcdf JJ |
624 | desc_abi (unsigned char abi, |
625 | unsigned char context, | |
626 | struct unw_state_record *sr) | |
2a1ee410 | 627 | { |
3950dcdf | 628 | sr->unwabi = (abi << 8) | context; |
2a1ee410 RH |
629 | } |
630 | ||
631 | static inline void | |
632 | desc_br_gr (unsigned char brmask, unsigned char gr, | |
633 | struct unw_state_record *sr) | |
634 | { | |
635 | int i; | |
636 | ||
637 | for (i = 0; i < 5; ++i) | |
638 | { | |
639 | if (brmask & 1) | |
640 | set_reg (sr->curr.reg + UNW_REG_B1 + i, UNW_WHERE_GR, | |
641 | sr->region_start + sr->region_len - 1, gr++); | |
642 | brmask >>= 1; | |
643 | } | |
644 | } | |
645 | ||
646 | static inline void | |
647 | desc_br_mem (unsigned char brmask, struct unw_state_record *sr) | |
648 | { | |
649 | int i; | |
650 | ||
651 | for (i = 0; i < 5; ++i) | |
652 | { | |
653 | if (brmask & 1) | |
654 | { | |
655 | set_reg (sr->curr.reg + UNW_REG_B1 + i, UNW_WHERE_SPILL_HOME, | |
656 | sr->region_start + sr->region_len - 1, 0); | |
657 | sr->any_spills = 1; | |
658 | } | |
659 | brmask >>= 1; | |
660 | } | |
661 | } | |
662 | ||
663 | static inline void | |
664 | desc_frgr_mem (unsigned char grmask, unw_word frmask, | |
665 | struct unw_state_record *sr) | |
666 | { | |
667 | int i; | |
668 | ||
669 | for (i = 0; i < 4; ++i) | |
670 | { | |
671 | if ((grmask & 1) != 0) | |
672 | { | |
673 | set_reg (sr->curr.reg + UNW_REG_R4 + i, UNW_WHERE_SPILL_HOME, | |
674 | sr->region_start + sr->region_len - 1, 0); | |
675 | sr->any_spills = 1; | |
676 | } | |
677 | grmask >>= 1; | |
678 | } | |
679 | for (i = 0; i < 20; ++i) | |
680 | { | |
681 | if ((frmask & 1) != 0) | |
682 | { | |
1d9ad0e0 RH |
683 | enum unw_register_index base = i < 4 ? UNW_REG_F2 : UNW_REG_F16 - 4; |
684 | set_reg (sr->curr.reg + base + i, UNW_WHERE_SPILL_HOME, | |
2a1ee410 RH |
685 | sr->region_start + sr->region_len - 1, 0); |
686 | sr->any_spills = 1; | |
687 | } | |
688 | frmask >>= 1; | |
689 | } | |
690 | } | |
691 | ||
692 | static inline void | |
693 | desc_fr_mem (unsigned char frmask, struct unw_state_record *sr) | |
694 | { | |
695 | int i; | |
696 | ||
697 | for (i = 0; i < 4; ++i) | |
698 | { | |
699 | if ((frmask & 1) != 0) | |
700 | { | |
701 | set_reg (sr->curr.reg + UNW_REG_F2 + i, UNW_WHERE_SPILL_HOME, | |
702 | sr->region_start + sr->region_len - 1, 0); | |
703 | sr->any_spills = 1; | |
704 | } | |
705 | frmask >>= 1; | |
706 | } | |
707 | } | |
708 | ||
709 | static inline void | |
710 | desc_gr_gr (unsigned char grmask, unsigned char gr, | |
711 | struct unw_state_record *sr) | |
712 | { | |
713 | int i; | |
714 | ||
715 | for (i = 0; i < 4; ++i) | |
716 | { | |
717 | if ((grmask & 1) != 0) | |
718 | set_reg (sr->curr.reg + UNW_REG_R4 + i, UNW_WHERE_GR, | |
719 | sr->region_start + sr->region_len - 1, gr++); | |
720 | grmask >>= 1; | |
721 | } | |
722 | } | |
723 | ||
724 | static inline void | |
725 | desc_gr_mem (unsigned char grmask, struct unw_state_record *sr) | |
726 | { | |
727 | int i; | |
728 | ||
729 | for (i = 0; i < 4; ++i) | |
730 | { | |
731 | if ((grmask & 1) != 0) | |
732 | { | |
733 | set_reg (sr->curr.reg + UNW_REG_R4 + i, UNW_WHERE_SPILL_HOME, | |
734 | sr->region_start + sr->region_len - 1, 0); | |
735 | sr->any_spills = 1; | |
736 | } | |
737 | grmask >>= 1; | |
738 | } | |
739 | } | |
740 | ||
741 | static inline void | |
742 | desc_mem_stack_f (unw_word t, unw_word size, struct unw_state_record *sr) | |
743 | { | |
744 | set_reg (sr->curr.reg + UNW_REG_PSP, UNW_WHERE_NONE, | |
745 | sr->region_start + MIN ((int)t, sr->region_len - 1), 16*size); | |
746 | } | |
747 | ||
748 | static inline void | |
749 | desc_mem_stack_v (unw_word t, struct unw_state_record *sr) | |
750 | { | |
751 | sr->curr.reg[UNW_REG_PSP].when | |
752 | = sr->region_start + MIN ((int)t, sr->region_len - 1); | |
753 | } | |
754 | ||
755 | static inline void | |
756 | desc_reg_gr (unsigned char reg, unsigned char dst, struct unw_state_record *sr) | |
757 | { | |
758 | set_reg (sr->curr.reg + reg, UNW_WHERE_GR, | |
759 | sr->region_start + sr->region_len - 1, dst); | |
760 | } | |
761 | ||
762 | static inline void | |
763 | desc_reg_psprel (unsigned char reg, unw_word pspoff, | |
764 | struct unw_state_record *sr) | |
765 | { | |
766 | set_reg (sr->curr.reg + reg, UNW_WHERE_PSPREL, | |
767 | sr->region_start + sr->region_len - 1, | |
768 | 0x10 - 4*pspoff); | |
769 | } | |
770 | ||
771 | static inline void | |
772 | desc_reg_sprel (unsigned char reg, unw_word spoff, struct unw_state_record *sr) | |
773 | { | |
774 | set_reg (sr->curr.reg + reg, UNW_WHERE_SPREL, | |
775 | sr->region_start + sr->region_len - 1, | |
776 | 4*spoff); | |
777 | } | |
778 | ||
779 | static inline void | |
780 | desc_rp_br (unsigned char dst, struct unw_state_record *sr) | |
781 | { | |
782 | sr->return_link_reg = dst; | |
783 | } | |
784 | ||
785 | static inline void | |
786 | desc_reg_when (unsigned char regnum, unw_word t, struct unw_state_record *sr) | |
787 | { | |
788 | struct unw_reg_info *reg = sr->curr.reg + regnum; | |
789 | ||
790 | if (reg->where == UNW_WHERE_NONE) | |
791 | reg->where = UNW_WHERE_GR_SAVE; | |
792 | reg->when = sr->region_start + MIN ((int)t, sr->region_len - 1); | |
793 | } | |
794 | ||
795 | static inline void | |
796 | desc_spill_base (unw_word pspoff, struct unw_state_record *sr) | |
797 | { | |
798 | sr->spill_offset = 0x10 - 4*pspoff; | |
799 | } | |
800 | ||
801 | static inline unsigned char * | |
802 | desc_spill_mask (unsigned char *imaskp, struct unw_state_record *sr) | |
803 | { | |
804 | sr->imask = imaskp; | |
805 | return imaskp + (2*sr->region_len + 7)/8; | |
806 | } | |
807 | ||
808 | /* | |
809 | * Body descriptors. | |
810 | */ | |
811 | static inline void | |
812 | desc_epilogue (unw_word t, unw_word ecount, struct unw_state_record *sr) | |
813 | { | |
814 | sr->epilogue_start = sr->region_start + sr->region_len - 1 - t; | |
815 | sr->epilogue_count = ecount + 1; | |
816 | } | |
817 | ||
818 | static inline void | |
819 | desc_copy_state (unw_word label, struct unw_state_record *sr) | |
820 | { | |
5025a549 | 821 | struct unw_labeled_state *ls; |
2a1ee410 | 822 | |
5025a549 | 823 | for (ls = sr->labeled_states; ls; ls = ls->next) |
2a1ee410 | 824 | { |
5025a549 DM |
825 | if (ls->label == label) |
826 | { | |
72e32876 RH |
827 | free_state_stack (&sr->curr); |
828 | memcpy (&sr->curr, &ls->saved_state, sizeof (sr->curr)); | |
829 | sr->curr.next = dup_state_stack (ls->saved_state.next); | |
2a1ee410 RH |
830 | return; |
831 | } | |
832 | } | |
833 | abort (); | |
834 | } | |
835 | ||
836 | static inline void | |
837 | desc_label_state (unw_word label, struct unw_state_record *sr) | |
838 | { | |
72e32876 | 839 | struct unw_labeled_state *ls = alloc_label_state (); |
2a1ee410 | 840 | |
5025a549 | 841 | ls->label = label; |
72e32876 RH |
842 | memcpy (&ls->saved_state, &sr->curr, sizeof (ls->saved_state)); |
843 | ls->saved_state.next = dup_state_stack (sr->curr.next); | |
5025a549 | 844 | |
72e32876 | 845 | /* Insert into list of labeled states. */ |
5025a549 DM |
846 | ls->next = sr->labeled_states; |
847 | sr->labeled_states = ls; | |
2a1ee410 RH |
848 | } |
849 | ||
850 | /* | |
851 | * General descriptors. | |
852 | */ | |
853 | ||
854 | static inline int | |
855 | desc_is_active (unsigned char qp, unw_word t, struct unw_state_record *sr) | |
856 | { | |
857 | if (sr->when_target <= sr->region_start + MIN ((int)t, sr->region_len - 1)) | |
858 | return 0; | |
859 | if (qp > 0) | |
860 | { | |
861 | if ((sr->pr_val & (1UL << qp)) == 0) | |
862 | return 0; | |
863 | sr->pr_mask |= (1UL << qp); | |
864 | } | |
865 | return 1; | |
866 | } | |
867 | ||
868 | static inline void | |
869 | desc_restore_p (unsigned char qp, unw_word t, unsigned char abreg, | |
870 | struct unw_state_record *sr) | |
871 | { | |
872 | struct unw_reg_info *r; | |
873 | ||
874 | if (! desc_is_active (qp, t, sr)) | |
875 | return; | |
876 | ||
877 | r = sr->curr.reg + decode_abreg (abreg, 0); | |
878 | r->where = UNW_WHERE_NONE; | |
879 | r->when = sr->region_start + MIN ((int)t, sr->region_len - 1); | |
880 | r->val = 0; | |
881 | } | |
882 | ||
883 | static inline void | |
884 | desc_spill_reg_p (unsigned char qp, unw_word t, unsigned char abreg, | |
885 | unsigned char x, unsigned char ytreg, | |
886 | struct unw_state_record *sr) | |
887 | { | |
888 | enum unw_where where = UNW_WHERE_GR; | |
889 | struct unw_reg_info *r; | |
890 | ||
891 | if (! desc_is_active (qp, t, sr)) | |
892 | return; | |
893 | ||
894 | if (x) | |
895 | where = UNW_WHERE_BR; | |
896 | else if (ytreg & 0x80) | |
897 | where = UNW_WHERE_FR; | |
898 | ||
899 | r = sr->curr.reg + decode_abreg (abreg, 0); | |
900 | r->where = where; | |
901 | r->when = sr->region_start + MIN ((int)t, sr->region_len - 1); | |
902 | r->val = ytreg & 0x7f; | |
903 | } | |
904 | ||
905 | static inline void | |
906 | desc_spill_psprel_p (unsigned char qp, unw_word t, unsigned char abreg, | |
907 | unw_word pspoff, struct unw_state_record *sr) | |
908 | { | |
909 | struct unw_reg_info *r; | |
910 | ||
911 | if (! desc_is_active (qp, t, sr)) | |
912 | return; | |
913 | ||
914 | r = sr->curr.reg + decode_abreg (abreg, 1); | |
915 | r->where = UNW_WHERE_PSPREL; | |
916 | r->when = sr->region_start + MIN((int)t, sr->region_len - 1); | |
917 | r->val = 0x10 - 4*pspoff; | |
918 | } | |
919 | ||
920 | static inline void | |
921 | desc_spill_sprel_p (unsigned char qp, unw_word t, unsigned char abreg, | |
922 | unw_word spoff, struct unw_state_record *sr) | |
923 | { | |
924 | struct unw_reg_info *r; | |
925 | ||
926 | if (! desc_is_active (qp, t, sr)) | |
927 | return; | |
928 | ||
929 | r = sr->curr.reg + decode_abreg (abreg, 1); | |
930 | r->where = UNW_WHERE_SPREL; | |
931 | r->when = sr->region_start + MIN ((int)t, sr->region_len - 1); | |
932 | r->val = 4*spoff; | |
933 | } | |
934 | ||
935 | \f | |
936 | #define UNW_DEC_BAD_CODE(code) abort (); | |
937 | ||
938 | /* Region headers. */ | |
939 | #define UNW_DEC_PROLOGUE_GR(fmt,r,m,gr,arg) desc_prologue(0,r,m,gr,arg) | |
940 | #define UNW_DEC_PROLOGUE(fmt,b,r,arg) desc_prologue(b,r,0,32,arg) | |
941 | ||
ed168e45 | 942 | /* Prologue descriptors. */ |
2a1ee410 RH |
943 | #define UNW_DEC_ABI(fmt,a,c,arg) desc_abi(a,c,arg) |
944 | #define UNW_DEC_BR_GR(fmt,b,g,arg) desc_br_gr(b,g,arg) | |
945 | #define UNW_DEC_BR_MEM(fmt,b,arg) desc_br_mem(b,arg) | |
946 | #define UNW_DEC_FRGR_MEM(fmt,g,f,arg) desc_frgr_mem(g,f,arg) | |
947 | #define UNW_DEC_FR_MEM(fmt,f,arg) desc_fr_mem(f,arg) | |
948 | #define UNW_DEC_GR_GR(fmt,m,g,arg) desc_gr_gr(m,g,arg) | |
949 | #define UNW_DEC_GR_MEM(fmt,m,arg) desc_gr_mem(m,arg) | |
950 | #define UNW_DEC_MEM_STACK_F(fmt,t,s,arg) desc_mem_stack_f(t,s,arg) | |
951 | #define UNW_DEC_MEM_STACK_V(fmt,t,arg) desc_mem_stack_v(t,arg) | |
952 | #define UNW_DEC_REG_GR(fmt,r,d,arg) desc_reg_gr(r,d,arg) | |
953 | #define UNW_DEC_REG_PSPREL(fmt,r,o,arg) desc_reg_psprel(r,o,arg) | |
954 | #define UNW_DEC_REG_SPREL(fmt,r,o,arg) desc_reg_sprel(r,o,arg) | |
955 | #define UNW_DEC_REG_WHEN(fmt,r,t,arg) desc_reg_when(r,t,arg) | |
956 | #define UNW_DEC_PRIUNAT_WHEN_GR(fmt,t,arg) desc_reg_when(UNW_REG_PRI_UNAT_GR,t,arg) | |
957 | #define UNW_DEC_PRIUNAT_WHEN_MEM(fmt,t,arg) desc_reg_when(UNW_REG_PRI_UNAT_MEM,t,arg) | |
958 | #define UNW_DEC_PRIUNAT_GR(fmt,r,arg) desc_reg_gr(UNW_REG_PRI_UNAT_GR,r,arg) | |
959 | #define UNW_DEC_PRIUNAT_PSPREL(fmt,o,arg) desc_reg_psprel(UNW_REG_PRI_UNAT_MEM,o,arg) | |
960 | #define UNW_DEC_PRIUNAT_SPREL(fmt,o,arg) desc_reg_sprel(UNW_REG_PRI_UNAT_MEM,o,arg) | |
961 | #define UNW_DEC_RP_BR(fmt,d,arg) desc_rp_br(d,arg) | |
962 | #define UNW_DEC_SPILL_BASE(fmt,o,arg) desc_spill_base(o,arg) | |
963 | #define UNW_DEC_SPILL_MASK(fmt,m,arg) (m = desc_spill_mask(m,arg)) | |
964 | ||
965 | /* Body descriptors. */ | |
966 | #define UNW_DEC_EPILOGUE(fmt,t,c,arg) desc_epilogue(t,c,arg) | |
967 | #define UNW_DEC_COPY_STATE(fmt,l,arg) desc_copy_state(l,arg) | |
968 | #define UNW_DEC_LABEL_STATE(fmt,l,arg) desc_label_state(l,arg) | |
969 | ||
970 | /* General unwind descriptors. */ | |
971 | #define UNW_DEC_SPILL_REG_P(f,p,t,a,x,y,arg) desc_spill_reg_p(p,t,a,x,y,arg) | |
972 | #define UNW_DEC_SPILL_REG(f,t,a,x,y,arg) desc_spill_reg_p(0,t,a,x,y,arg) | |
973 | #define UNW_DEC_SPILL_PSPREL_P(f,p,t,a,o,arg) desc_spill_psprel_p(p,t,a,o,arg) | |
974 | #define UNW_DEC_SPILL_PSPREL(f,t,a,o,arg) desc_spill_psprel_p(0,t,a,o,arg) | |
975 | #define UNW_DEC_SPILL_SPREL_P(f,p,t,a,o,arg) desc_spill_sprel_p(p,t,a,o,arg) | |
976 | #define UNW_DEC_SPILL_SPREL(f,t,a,o,arg) desc_spill_sprel_p(0,t,a,o,arg) | |
977 | #define UNW_DEC_RESTORE_P(f,p,t,a,arg) desc_restore_p(p,t,a,arg) | |
978 | #define UNW_DEC_RESTORE(f,t,a,arg) desc_restore_p(0,t,a,arg) | |
979 | ||
980 | \f | |
981 | /* | |
982 | * Generic IA-64 unwind info decoder. | |
983 | * | |
984 | * This file is used both by the Linux kernel and objdump. Please keep | |
985 | * the copies of this file in sync. | |
986 | * | |
987 | * You need to customize the decoder by defining the following | |
988 | * macros/constants before including this file: | |
989 | * | |
990 | * Types: | |
991 | * unw_word Unsigned integer type with at least 64 bits | |
992 | * | |
993 | * Register names: | |
994 | * UNW_REG_BSP | |
995 | * UNW_REG_BSPSTORE | |
996 | * UNW_REG_FPSR | |
997 | * UNW_REG_LC | |
998 | * UNW_REG_PFS | |
999 | * UNW_REG_PR | |
1000 | * UNW_REG_RNAT | |
1001 | * UNW_REG_PSP | |
1002 | * UNW_REG_RP | |
1003 | * UNW_REG_UNAT | |
1004 | * | |
1005 | * Decoder action macros: | |
1006 | * UNW_DEC_BAD_CODE(code) | |
1007 | * UNW_DEC_ABI(fmt,abi,context,arg) | |
1008 | * UNW_DEC_BR_GR(fmt,brmask,gr,arg) | |
1009 | * UNW_DEC_BR_MEM(fmt,brmask,arg) | |
1010 | * UNW_DEC_COPY_STATE(fmt,label,arg) | |
1011 | * UNW_DEC_EPILOGUE(fmt,t,ecount,arg) | |
1012 | * UNW_DEC_FRGR_MEM(fmt,grmask,frmask,arg) | |
1013 | * UNW_DEC_FR_MEM(fmt,frmask,arg) | |
1014 | * UNW_DEC_GR_GR(fmt,grmask,gr,arg) | |
1015 | * UNW_DEC_GR_MEM(fmt,grmask,arg) | |
1016 | * UNW_DEC_LABEL_STATE(fmt,label,arg) | |
1017 | * UNW_DEC_MEM_STACK_F(fmt,t,size,arg) | |
1018 | * UNW_DEC_MEM_STACK_V(fmt,t,arg) | |
1019 | * UNW_DEC_PRIUNAT_GR(fmt,r,arg) | |
1020 | * UNW_DEC_PRIUNAT_WHEN_GR(fmt,t,arg) | |
1021 | * UNW_DEC_PRIUNAT_WHEN_MEM(fmt,t,arg) | |
1022 | * UNW_DEC_PRIUNAT_WHEN_PSPREL(fmt,pspoff,arg) | |
1023 | * UNW_DEC_PRIUNAT_WHEN_SPREL(fmt,spoff,arg) | |
1024 | * UNW_DEC_PROLOGUE(fmt,body,rlen,arg) | |
1025 | * UNW_DEC_PROLOGUE_GR(fmt,rlen,mask,grsave,arg) | |
1026 | * UNW_DEC_REG_PSPREL(fmt,reg,pspoff,arg) | |
1027 | * UNW_DEC_REG_REG(fmt,src,dst,arg) | |
1028 | * UNW_DEC_REG_SPREL(fmt,reg,spoff,arg) | |
1029 | * UNW_DEC_REG_WHEN(fmt,reg,t,arg) | |
1030 | * UNW_DEC_RESTORE(fmt,t,abreg,arg) | |
1031 | * UNW_DEC_RESTORE_P(fmt,qp,t,abreg,arg) | |
1032 | * UNW_DEC_SPILL_BASE(fmt,pspoff,arg) | |
1033 | * UNW_DEC_SPILL_MASK(fmt,imaskp,arg) | |
1034 | * UNW_DEC_SPILL_PSPREL(fmt,t,abreg,pspoff,arg) | |
1035 | * UNW_DEC_SPILL_PSPREL_P(fmt,qp,t,abreg,pspoff,arg) | |
1036 | * UNW_DEC_SPILL_REG(fmt,t,abreg,x,ytreg,arg) | |
1037 | * UNW_DEC_SPILL_REG_P(fmt,qp,t,abreg,x,ytreg,arg) | |
1038 | * UNW_DEC_SPILL_SPREL(fmt,t,abreg,spoff,arg) | |
1039 | * UNW_DEC_SPILL_SPREL_P(fmt,qp,t,abreg,pspoff,arg) | |
1040 | */ | |
1041 | ||
1042 | static unw_word | |
1043 | unw_decode_uleb128 (unsigned char **dpp) | |
1044 | { | |
1045 | unsigned shift = 0; | |
1046 | unw_word byte, result = 0; | |
1047 | unsigned char *bp = *dpp; | |
1048 | ||
1049 | while (1) | |
1050 | { | |
1051 | byte = *bp++; | |
1052 | result |= (byte & 0x7f) << shift; | |
1053 | if ((byte & 0x80) == 0) | |
1054 | break; | |
1055 | shift += 7; | |
1056 | } | |
1057 | *dpp = bp; | |
1058 | return result; | |
1059 | } | |
1060 | ||
1061 | static unsigned char * | |
1062 | unw_decode_x1 (unsigned char *dp, | |
1063 | unsigned char code __attribute__((unused)), | |
1064 | void *arg) | |
1065 | { | |
1066 | unsigned char byte1, abreg; | |
1067 | unw_word t, off; | |
1068 | ||
1069 | byte1 = *dp++; | |
1070 | t = unw_decode_uleb128 (&dp); | |
1071 | off = unw_decode_uleb128 (&dp); | |
1072 | abreg = (byte1 & 0x7f); | |
1073 | if (byte1 & 0x80) | |
1074 | UNW_DEC_SPILL_SPREL(X1, t, abreg, off, arg); | |
1075 | else | |
1076 | UNW_DEC_SPILL_PSPREL(X1, t, abreg, off, arg); | |
1077 | return dp; | |
1078 | } | |
1079 | ||
1080 | static unsigned char * | |
1081 | unw_decode_x2 (unsigned char *dp, | |
1082 | unsigned char code __attribute__((unused)), | |
1083 | void *arg) | |
1084 | { | |
1085 | unsigned char byte1, byte2, abreg, x, ytreg; | |
1086 | unw_word t; | |
1087 | ||
1088 | byte1 = *dp++; byte2 = *dp++; | |
1089 | t = unw_decode_uleb128 (&dp); | |
1090 | abreg = (byte1 & 0x7f); | |
1091 | ytreg = byte2; | |
1092 | x = (byte1 >> 7) & 1; | |
1093 | if ((byte1 & 0x80) == 0 && ytreg == 0) | |
1094 | UNW_DEC_RESTORE(X2, t, abreg, arg); | |
1095 | else | |
1096 | UNW_DEC_SPILL_REG(X2, t, abreg, x, ytreg, arg); | |
1097 | return dp; | |
1098 | } | |
1099 | ||
1100 | static unsigned char * | |
1101 | unw_decode_x3 (unsigned char *dp, | |
1102 | unsigned char code __attribute__((unused)), | |
1103 | void *arg) | |
1104 | { | |
1105 | unsigned char byte1, byte2, abreg, qp; | |
1106 | unw_word t, off; | |
1107 | ||
1108 | byte1 = *dp++; byte2 = *dp++; | |
1109 | t = unw_decode_uleb128 (&dp); | |
1110 | off = unw_decode_uleb128 (&dp); | |
1111 | ||
1112 | qp = (byte1 & 0x3f); | |
1113 | abreg = (byte2 & 0x7f); | |
1114 | ||
1115 | if (byte1 & 0x80) | |
1116 | UNW_DEC_SPILL_SPREL_P(X3, qp, t, abreg, off, arg); | |
1117 | else | |
1118 | UNW_DEC_SPILL_PSPREL_P(X3, qp, t, abreg, off, arg); | |
1119 | return dp; | |
1120 | } | |
1121 | ||
1122 | static unsigned char * | |
1123 | unw_decode_x4 (unsigned char *dp, | |
1124 | unsigned char code __attribute__((unused)), | |
1125 | void *arg) | |
1126 | { | |
1127 | unsigned char byte1, byte2, byte3, qp, abreg, x, ytreg; | |
1128 | unw_word t; | |
1129 | ||
1130 | byte1 = *dp++; byte2 = *dp++; byte3 = *dp++; | |
1131 | t = unw_decode_uleb128 (&dp); | |
1132 | ||
1133 | qp = (byte1 & 0x3f); | |
1134 | abreg = (byte2 & 0x7f); | |
1135 | x = (byte2 >> 7) & 1; | |
1136 | ytreg = byte3; | |
1137 | ||
1138 | if ((byte2 & 0x80) == 0 && byte3 == 0) | |
1139 | UNW_DEC_RESTORE_P(X4, qp, t, abreg, arg); | |
1140 | else | |
1141 | UNW_DEC_SPILL_REG_P(X4, qp, t, abreg, x, ytreg, arg); | |
1142 | return dp; | |
1143 | } | |
1144 | ||
1145 | static unsigned char * | |
1146 | unw_decode_r1 (unsigned char *dp, unsigned char code, void *arg) | |
1147 | { | |
1148 | int body = (code & 0x20) != 0; | |
1149 | unw_word rlen; | |
1150 | ||
1151 | rlen = (code & 0x1f); | |
1152 | UNW_DEC_PROLOGUE(R1, body, rlen, arg); | |
1153 | return dp; | |
1154 | } | |
1155 | ||
1156 | static unsigned char * | |
1157 | unw_decode_r2 (unsigned char *dp, unsigned char code, void *arg) | |
1158 | { | |
1159 | unsigned char byte1, mask, grsave; | |
1160 | unw_word rlen; | |
1161 | ||
1162 | byte1 = *dp++; | |
1163 | ||
1164 | mask = ((code & 0x7) << 1) | ((byte1 >> 7) & 1); | |
1165 | grsave = (byte1 & 0x7f); | |
1166 | rlen = unw_decode_uleb128 (&dp); | |
1167 | UNW_DEC_PROLOGUE_GR(R2, rlen, mask, grsave, arg); | |
1168 | return dp; | |
1169 | } | |
1170 | ||
1171 | static unsigned char * | |
1172 | unw_decode_r3 (unsigned char *dp, unsigned char code, void *arg) | |
1173 | { | |
1174 | unw_word rlen; | |
1175 | ||
1176 | rlen = unw_decode_uleb128 (&dp); | |
1177 | UNW_DEC_PROLOGUE(R3, ((code & 0x3) == 1), rlen, arg); | |
1178 | return dp; | |
1179 | } | |
1180 | ||
1181 | static unsigned char * | |
1182 | unw_decode_p1 (unsigned char *dp, unsigned char code, void *arg) | |
1183 | { | |
1184 | unsigned char brmask = (code & 0x1f); | |
1185 | ||
1186 | UNW_DEC_BR_MEM(P1, brmask, arg); | |
1187 | return dp; | |
1188 | } | |
1189 | ||
1190 | static unsigned char * | |
1191 | unw_decode_p2_p5 (unsigned char *dp, unsigned char code, void *arg) | |
1192 | { | |
1193 | if ((code & 0x10) == 0) | |
1194 | { | |
1195 | unsigned char byte1 = *dp++; | |
1196 | ||
1197 | UNW_DEC_BR_GR(P2, ((code & 0xf) << 1) | ((byte1 >> 7) & 1), | |
1198 | (byte1 & 0x7f), arg); | |
1199 | } | |
1200 | else if ((code & 0x08) == 0) | |
1201 | { | |
1202 | unsigned char byte1 = *dp++, r, dst; | |
1203 | ||
1204 | r = ((code & 0x7) << 1) | ((byte1 >> 7) & 1); | |
1205 | dst = (byte1 & 0x7f); | |
1206 | switch (r) | |
1207 | { | |
1208 | case 0: UNW_DEC_REG_GR(P3, UNW_REG_PSP, dst, arg); break; | |
1209 | case 1: UNW_DEC_REG_GR(P3, UNW_REG_RP, dst, arg); break; | |
1210 | case 2: UNW_DEC_REG_GR(P3, UNW_REG_PFS, dst, arg); break; | |
1211 | case 3: UNW_DEC_REG_GR(P3, UNW_REG_PR, dst, arg); break; | |
1212 | case 4: UNW_DEC_REG_GR(P3, UNW_REG_UNAT, dst, arg); break; | |
1213 | case 5: UNW_DEC_REG_GR(P3, UNW_REG_LC, dst, arg); break; | |
1214 | case 6: UNW_DEC_RP_BR(P3, dst, arg); break; | |
1215 | case 7: UNW_DEC_REG_GR(P3, UNW_REG_RNAT, dst, arg); break; | |
1216 | case 8: UNW_DEC_REG_GR(P3, UNW_REG_BSP, dst, arg); break; | |
1217 | case 9: UNW_DEC_REG_GR(P3, UNW_REG_BSPSTORE, dst, arg); break; | |
1218 | case 10: UNW_DEC_REG_GR(P3, UNW_REG_FPSR, dst, arg); break; | |
1219 | case 11: UNW_DEC_PRIUNAT_GR(P3, dst, arg); break; | |
1220 | default: UNW_DEC_BAD_CODE(r); break; | |
1221 | } | |
1222 | } | |
1223 | else if ((code & 0x7) == 0) | |
1224 | UNW_DEC_SPILL_MASK(P4, dp, arg); | |
1225 | else if ((code & 0x7) == 1) | |
1226 | { | |
1227 | unw_word grmask, frmask, byte1, byte2, byte3; | |
1228 | ||
1229 | byte1 = *dp++; byte2 = *dp++; byte3 = *dp++; | |
1230 | grmask = ((byte1 >> 4) & 0xf); | |
1231 | frmask = ((byte1 & 0xf) << 16) | (byte2 << 8) | byte3; | |
1232 | UNW_DEC_FRGR_MEM(P5, grmask, frmask, arg); | |
1233 | } | |
1234 | else | |
1235 | UNW_DEC_BAD_CODE(code); | |
1236 | return dp; | |
1237 | } | |
1238 | ||
1239 | static unsigned char * | |
1240 | unw_decode_p6 (unsigned char *dp, unsigned char code, void *arg) | |
1241 | { | |
1242 | int gregs = (code & 0x10) != 0; | |
1243 | unsigned char mask = (code & 0x0f); | |
1244 | ||
1245 | if (gregs) | |
1246 | UNW_DEC_GR_MEM(P6, mask, arg); | |
1247 | else | |
1248 | UNW_DEC_FR_MEM(P6, mask, arg); | |
1249 | return dp; | |
1250 | } | |
1251 | ||
1252 | static unsigned char * | |
1253 | unw_decode_p7_p10 (unsigned char *dp, unsigned char code, void *arg) | |
1254 | { | |
1255 | unsigned char r, byte1, byte2; | |
1256 | unw_word t, size; | |
1257 | ||
1258 | if ((code & 0x10) == 0) | |
1259 | { | |
1260 | r = (code & 0xf); | |
1261 | t = unw_decode_uleb128 (&dp); | |
1262 | switch (r) | |
1263 | { | |
1264 | case 0: | |
1265 | size = unw_decode_uleb128 (&dp); | |
1266 | UNW_DEC_MEM_STACK_F(P7, t, size, arg); | |
1267 | break; | |
1268 | ||
1269 | case 1: UNW_DEC_MEM_STACK_V(P7, t, arg); break; | |
1270 | case 2: UNW_DEC_SPILL_BASE(P7, t, arg); break; | |
1271 | case 3: UNW_DEC_REG_SPREL(P7, UNW_REG_PSP, t, arg); break; | |
1272 | case 4: UNW_DEC_REG_WHEN(P7, UNW_REG_RP, t, arg); break; | |
1273 | case 5: UNW_DEC_REG_PSPREL(P7, UNW_REG_RP, t, arg); break; | |
1274 | case 6: UNW_DEC_REG_WHEN(P7, UNW_REG_PFS, t, arg); break; | |
1275 | case 7: UNW_DEC_REG_PSPREL(P7, UNW_REG_PFS, t, arg); break; | |
1276 | case 8: UNW_DEC_REG_WHEN(P7, UNW_REG_PR, t, arg); break; | |
1277 | case 9: UNW_DEC_REG_PSPREL(P7, UNW_REG_PR, t, arg); break; | |
1278 | case 10: UNW_DEC_REG_WHEN(P7, UNW_REG_LC, t, arg); break; | |
1279 | case 11: UNW_DEC_REG_PSPREL(P7, UNW_REG_LC, t, arg); break; | |
1280 | case 12: UNW_DEC_REG_WHEN(P7, UNW_REG_UNAT, t, arg); break; | |
1281 | case 13: UNW_DEC_REG_PSPREL(P7, UNW_REG_UNAT, t, arg); break; | |
1282 | case 14: UNW_DEC_REG_WHEN(P7, UNW_REG_FPSR, t, arg); break; | |
1283 | case 15: UNW_DEC_REG_PSPREL(P7, UNW_REG_FPSR, t, arg); break; | |
1284 | default: UNW_DEC_BAD_CODE(r); break; | |
1285 | } | |
1286 | } | |
1287 | else | |
1288 | { | |
1289 | switch (code & 0xf) | |
1290 | { | |
1291 | case 0x0: /* p8 */ | |
1292 | { | |
1293 | r = *dp++; | |
1294 | t = unw_decode_uleb128 (&dp); | |
1295 | switch (r) | |
1296 | { | |
1297 | case 1: UNW_DEC_REG_SPREL(P8, UNW_REG_RP, t, arg); break; | |
1298 | case 2: UNW_DEC_REG_SPREL(P8, UNW_REG_PFS, t, arg); break; | |
1299 | case 3: UNW_DEC_REG_SPREL(P8, UNW_REG_PR, t, arg); break; | |
1300 | case 4: UNW_DEC_REG_SPREL(P8, UNW_REG_LC, t, arg); break; | |
1301 | case 5: UNW_DEC_REG_SPREL(P8, UNW_REG_UNAT, t, arg); break; | |
1302 | case 6: UNW_DEC_REG_SPREL(P8, UNW_REG_FPSR, t, arg); break; | |
1303 | case 7: UNW_DEC_REG_WHEN(P8, UNW_REG_BSP, t, arg); break; | |
1304 | case 8: UNW_DEC_REG_PSPREL(P8, UNW_REG_BSP, t, arg); break; | |
1305 | case 9: UNW_DEC_REG_SPREL(P8, UNW_REG_BSP, t, arg); break; | |
1306 | case 10: UNW_DEC_REG_WHEN(P8, UNW_REG_BSPSTORE, t, arg); break; | |
1307 | case 11: UNW_DEC_REG_PSPREL(P8, UNW_REG_BSPSTORE, t, arg); break; | |
1308 | case 12: UNW_DEC_REG_SPREL(P8, UNW_REG_BSPSTORE, t, arg); break; | |
1309 | case 13: UNW_DEC_REG_WHEN(P8, UNW_REG_RNAT, t, arg); break; | |
1310 | case 14: UNW_DEC_REG_PSPREL(P8, UNW_REG_RNAT, t, arg); break; | |
1311 | case 15: UNW_DEC_REG_SPREL(P8, UNW_REG_RNAT, t, arg); break; | |
1312 | case 16: UNW_DEC_PRIUNAT_WHEN_GR(P8, t, arg); break; | |
1313 | case 17: UNW_DEC_PRIUNAT_PSPREL(P8, t, arg); break; | |
1314 | case 18: UNW_DEC_PRIUNAT_SPREL(P8, t, arg); break; | |
1315 | case 19: UNW_DEC_PRIUNAT_WHEN_MEM(P8, t, arg); break; | |
1316 | default: UNW_DEC_BAD_CODE(r); break; | |
1317 | } | |
1318 | } | |
1319 | break; | |
1320 | ||
1321 | case 0x1: | |
1322 | byte1 = *dp++; byte2 = *dp++; | |
1323 | UNW_DEC_GR_GR(P9, (byte1 & 0xf), (byte2 & 0x7f), arg); | |
1324 | break; | |
1325 | ||
1326 | case 0xf: /* p10 */ | |
1327 | byte1 = *dp++; byte2 = *dp++; | |
1328 | UNW_DEC_ABI(P10, byte1, byte2, arg); | |
1329 | break; | |
1330 | ||
1331 | case 0x9: | |
1332 | return unw_decode_x1 (dp, code, arg); | |
1333 | ||
1334 | case 0xa: | |
1335 | return unw_decode_x2 (dp, code, arg); | |
1336 | ||
1337 | case 0xb: | |
1338 | return unw_decode_x3 (dp, code, arg); | |
1339 | ||
1340 | case 0xc: | |
1341 | return unw_decode_x4 (dp, code, arg); | |
1342 | ||
1343 | default: | |
1344 | UNW_DEC_BAD_CODE(code); | |
1345 | break; | |
1346 | } | |
1347 | } | |
1348 | return dp; | |
1349 | } | |
1350 | ||
1351 | static unsigned char * | |
1352 | unw_decode_b1 (unsigned char *dp, unsigned char code, void *arg) | |
1353 | { | |
1354 | unw_word label = (code & 0x1f); | |
1355 | ||
1356 | if ((code & 0x20) != 0) | |
1357 | UNW_DEC_COPY_STATE(B1, label, arg); | |
1358 | else | |
1359 | UNW_DEC_LABEL_STATE(B1, label, arg); | |
1360 | return dp; | |
1361 | } | |
1362 | ||
1363 | static unsigned char * | |
1364 | unw_decode_b2 (unsigned char *dp, unsigned char code, void *arg) | |
1365 | { | |
1366 | unw_word t; | |
1367 | ||
1368 | t = unw_decode_uleb128 (&dp); | |
1369 | UNW_DEC_EPILOGUE(B2, t, (code & 0x1f), arg); | |
1370 | return dp; | |
1371 | } | |
1372 | ||
1373 | static unsigned char * | |
1374 | unw_decode_b3_x4 (unsigned char *dp, unsigned char code, void *arg) | |
1375 | { | |
1376 | unw_word t, ecount, label; | |
1377 | ||
1378 | if ((code & 0x10) == 0) | |
1379 | { | |
1380 | t = unw_decode_uleb128 (&dp); | |
1381 | ecount = unw_decode_uleb128 (&dp); | |
1382 | UNW_DEC_EPILOGUE(B3, t, ecount, arg); | |
1383 | } | |
1384 | else if ((code & 0x07) == 0) | |
1385 | { | |
1386 | label = unw_decode_uleb128 (&dp); | |
1387 | if ((code & 0x08) != 0) | |
1388 | UNW_DEC_COPY_STATE(B4, label, arg); | |
1389 | else | |
1390 | UNW_DEC_LABEL_STATE(B4, label, arg); | |
1391 | } | |
1392 | else | |
1393 | switch (code & 0x7) | |
1394 | { | |
1395 | case 1: return unw_decode_x1 (dp, code, arg); | |
1396 | case 2: return unw_decode_x2 (dp, code, arg); | |
1397 | case 3: return unw_decode_x3 (dp, code, arg); | |
1398 | case 4: return unw_decode_x4 (dp, code, arg); | |
1399 | default: UNW_DEC_BAD_CODE(code); break; | |
1400 | } | |
1401 | return dp; | |
1402 | } | |
1403 | ||
1404 | typedef unsigned char *(*unw_decoder) (unsigned char *, unsigned char, void *); | |
1405 | ||
0139adca | 1406 | static const unw_decoder unw_decode_table[2][8] = |
2a1ee410 RH |
1407 | { |
1408 | /* prologue table: */ | |
1409 | { | |
1410 | unw_decode_r1, /* 0 */ | |
1411 | unw_decode_r1, | |
1412 | unw_decode_r2, | |
1413 | unw_decode_r3, | |
1414 | unw_decode_p1, /* 4 */ | |
1415 | unw_decode_p2_p5, | |
1416 | unw_decode_p6, | |
1417 | unw_decode_p7_p10 | |
1418 | }, | |
1419 | { | |
1420 | unw_decode_r1, /* 0 */ | |
1421 | unw_decode_r1, | |
1422 | unw_decode_r2, | |
1423 | unw_decode_r3, | |
1424 | unw_decode_b1, /* 4 */ | |
1425 | unw_decode_b1, | |
1426 | unw_decode_b2, | |
1427 | unw_decode_b3_x4 | |
1428 | } | |
1429 | }; | |
1430 | ||
1431 | /* | |
1432 | * Decode one descriptor and return address of next descriptor. | |
1433 | */ | |
1434 | static inline unsigned char * | |
1435 | unw_decode (unsigned char *dp, int inside_body, void *arg) | |
1436 | { | |
1437 | unw_decoder decoder; | |
1438 | unsigned char code; | |
1439 | ||
1440 | code = *dp++; | |
1441 | decoder = unw_decode_table[inside_body][code >> 5]; | |
1442 | dp = (*decoder) (dp, code, arg); | |
1443 | return dp; | |
1444 | } | |
1445 | ||
1446 | \f | |
1447 | /* RSE helper functions. */ | |
1448 | ||
9e916de7 TG |
1449 | static inline unw_word |
1450 | ia64_rse_slot_num (unw_word *addr) | |
2a1ee410 | 1451 | { |
9e916de7 | 1452 | return (((unw_word) addr) >> 3) & 0x3f; |
2a1ee410 RH |
1453 | } |
1454 | ||
1455 | /* Return TRUE if ADDR is the address of an RNAT slot. */ | |
9e916de7 TG |
1456 | static inline unw_word |
1457 | ia64_rse_is_rnat_slot (unw_word *addr) | |
2a1ee410 RH |
1458 | { |
1459 | return ia64_rse_slot_num (addr) == 0x3f; | |
1460 | } | |
1461 | ||
1462 | /* Returns the address of the RNAT slot that covers the slot at | |
1463 | address SLOT_ADDR. */ | |
9e916de7 TG |
1464 | static inline unw_word * |
1465 | ia64_rse_rnat_addr (unw_word *slot_addr) | |
2a1ee410 | 1466 | { |
9e916de7 | 1467 | return (unw_word *) ((unw_word) slot_addr | (0x3f << 3)); |
2a1ee410 RH |
1468 | } |
1469 | ||
9e4f94de | 1470 | /* Calculate the number of registers in the dirty partition starting at |
2a1ee410 RH |
1471 | BSPSTORE with a size of DIRTY bytes. This isn't simply DIRTY |
1472 | divided by eight because the 64th slot is used to store ar.rnat. */ | |
9e916de7 TG |
1473 | static inline unw_word |
1474 | ia64_rse_num_regs (unw_word *bspstore, unw_word *bsp) | |
2a1ee410 | 1475 | { |
9e916de7 | 1476 | unw_word slots = (bsp - bspstore); |
2a1ee410 RH |
1477 | |
1478 | return slots - (ia64_rse_slot_num (bspstore) + slots)/0x40; | |
1479 | } | |
1480 | ||
1481 | /* The inverse of the above: given bspstore and the number of | |
1482 | registers, calculate ar.bsp. */ | |
9e916de7 TG |
1483 | static inline unw_word * |
1484 | ia64_rse_skip_regs (unw_word *addr, int num_regs) | |
2a1ee410 | 1485 | { |
9e916de7 | 1486 | int delta = ia64_rse_slot_num (addr) + num_regs; |
2a1ee410 RH |
1487 | |
1488 | if (num_regs < 0) | |
1489 | delta -= 0x3e; | |
1490 | return addr + num_regs + delta/0x3f; | |
1491 | } | |
1492 | ||
1493 | \f | |
e8c89d29 JJ |
1494 | /* Copy register backing store from SRC to DST, LEN words |
1495 | (which include both saved registers and nat collections). | |
1496 | DST_RNAT is a partial nat collection for DST. SRC and DST | |
1497 | don't have to be equal modulo 64 slots, so it cannot be | |
1498 | done with a simple memcpy as the nat collections will be | |
1499 | at different relative offsets and need to be combined together. */ | |
1500 | static void | |
9e916de7 TG |
1501 | ia64_copy_rbs (struct _Unwind_Context *info, unw_word dst, |
1502 | unw_word src, unw_word len, unw_word dst_rnat) | |
e8c89d29 | 1503 | { |
9e916de7 TG |
1504 | unw_word count; |
1505 | unw_word src_rnat; | |
1506 | unw_word shift1, shift2; | |
e8c89d29 JJ |
1507 | |
1508 | len <<= 3; | |
9e916de7 | 1509 | dst_rnat &= (1ULL << ((dst >> 3) & 0x3f)) - 1; |
e8c89d29 | 1510 | src_rnat = src >= info->regstk_top |
9e916de7 TG |
1511 | ? info->rnat : *(unw_word *) (src | 0x1f8); |
1512 | src_rnat &= ~((1ULL << ((src >> 3) & 0x3f)) - 1); | |
e8c89d29 | 1513 | /* Just to make sure. */ |
9e916de7 | 1514 | src_rnat &= ~(1ULL << 63); |
e8c89d29 JJ |
1515 | shift1 = ((dst - src) >> 3) & 0x3f; |
1516 | if ((dst & 0x1f8) < (src & 0x1f8)) | |
1517 | shift1--; | |
1518 | shift2 = 0x3f - shift1; | |
1519 | if ((dst & 0x1f8) >= (src & 0x1f8)) | |
1520 | { | |
1521 | count = ~dst & 0x1f8; | |
1522 | goto first; | |
1523 | } | |
1524 | count = ~src & 0x1f8; | |
1525 | goto second; | |
1526 | while (len > 0) | |
1527 | { | |
1528 | src_rnat = src >= info->regstk_top | |
9e916de7 | 1529 | ? info->rnat : *(unw_word *) (src | 0x1f8); |
e8c89d29 | 1530 | /* Just to make sure. */ |
9e916de7 | 1531 | src_rnat &= ~(1ULL << 63); |
e8c89d29 JJ |
1532 | count = shift2 << 3; |
1533 | first: | |
1534 | if (count > len) | |
1535 | count = len; | |
1536 | memcpy ((char *) dst, (char *) src, count); | |
1537 | dst += count; | |
1538 | src += count; | |
1539 | len -= count; | |
9e916de7 | 1540 | dst_rnat |= (src_rnat << shift1) & ~(1ULL << 63); |
e8c89d29 JJ |
1541 | if (len <= 0) |
1542 | break; | |
9e916de7 | 1543 | *(unw_word *) dst = dst_rnat; |
e8c89d29 JJ |
1544 | dst += 8; |
1545 | dst_rnat = 0; | |
1546 | count = shift1 << 3; | |
1547 | second: | |
1548 | if (count > len) | |
1549 | count = len; | |
1550 | memcpy ((char *) dst, (char *) src, count); | |
1551 | dst += count; | |
1552 | src += count + 8; | |
1553 | len -= count + 8; | |
1554 | dst_rnat |= (src_rnat >> shift2); | |
1555 | } | |
1556 | if ((dst & 0x1f8) == 0x1f8) | |
1557 | { | |
9e916de7 | 1558 | *(unw_word *) dst = dst_rnat; |
e8c89d29 JJ |
1559 | dst += 8; |
1560 | dst_rnat = 0; | |
1561 | } | |
1562 | /* Set info->regstk_top to lowest rbs address which will use | |
1563 | info->rnat collection. */ | |
9e916de7 | 1564 | info->regstk_top = dst & ~0x1ffULL; |
e8c89d29 JJ |
1565 | info->rnat = dst_rnat; |
1566 | } | |
1567 | ||
2a1ee410 RH |
1568 | /* Unwind accessors. */ |
1569 | ||
1570 | static void | |
1571 | unw_access_gr (struct _Unwind_Context *info, int regnum, | |
9e916de7 | 1572 | unw_word *val, char *nat, int write) |
2a1ee410 | 1573 | { |
9e916de7 | 1574 | unw_word *addr, *nat_addr = 0, nat_mask = 0, dummy_nat; |
2a1ee410 RH |
1575 | struct unw_ireg *ireg; |
1576 | ||
1577 | if ((unsigned) regnum - 1 >= 127) | |
1578 | abort (); | |
1579 | ||
1580 | if (regnum < 1) | |
1581 | { | |
1582 | nat_addr = addr = &dummy_nat; | |
1583 | dummy_nat = 0; | |
1584 | } | |
1585 | else if (regnum < 32) | |
1586 | { | |
1587 | /* Access a non-stacked register. */ | |
4d9720f0 | 1588 | ireg = &info->ireg[regnum - 2]; |
2a1ee410 RH |
1589 | addr = ireg->loc; |
1590 | if (addr) | |
1591 | { | |
1592 | nat_addr = addr + ireg->nat.off; | |
1593 | switch (ireg->nat.type) | |
1594 | { | |
1595 | case UNW_NAT_VAL: | |
1596 | /* Simulate getf.sig/setf.sig. */ | |
1597 | if (write) | |
1598 | { | |
1599 | if (*nat) | |
1600 | { | |
1601 | /* Write NaTVal and be done with it. */ | |
1602 | addr[0] = 0; | |
1603 | addr[1] = 0x1fffe; | |
1604 | return; | |
1605 | } | |
1606 | addr[1] = 0x1003e; | |
1607 | } | |
1608 | else if (addr[0] == 0 && addr[1] == 0x1ffe) | |
1609 | { | |
1610 | /* Return NaT and be done with it. */ | |
1611 | *val = 0; | |
1612 | *nat = 1; | |
1613 | return; | |
1614 | } | |
5efb1046 | 1615 | /* FALLTHRU */ |
2a1ee410 RH |
1616 | |
1617 | case UNW_NAT_NONE: | |
1618 | dummy_nat = 0; | |
1619 | nat_addr = &dummy_nat; | |
1620 | break; | |
1621 | ||
1622 | case UNW_NAT_MEMSTK: | |
9e916de7 | 1623 | nat_mask = 1UL << ((unw_word) addr & 0x1f8)/8; |
2a1ee410 RH |
1624 | break; |
1625 | ||
1626 | case UNW_NAT_REGSTK: | |
9e916de7 | 1627 | if ((unw_word) addr >= info->regstk_top) |
2a1ee410 | 1628 | nat_addr = &info->rnat; |
e8c89d29 JJ |
1629 | else |
1630 | nat_addr = ia64_rse_rnat_addr (addr); | |
9e916de7 | 1631 | nat_mask = 1ULL << ia64_rse_slot_num (addr); |
2a1ee410 RH |
1632 | break; |
1633 | } | |
1634 | } | |
1635 | } | |
1636 | else | |
1637 | { | |
1638 | /* Access a stacked register. */ | |
9e916de7 TG |
1639 | addr = ia64_rse_skip_regs ((unw_word *) info->bsp, regnum - 32); |
1640 | if ((unw_word) addr >= info->regstk_top) | |
2a1ee410 | 1641 | nat_addr = &info->rnat; |
e8c89d29 JJ |
1642 | else |
1643 | nat_addr = ia64_rse_rnat_addr (addr); | |
2a1ee410 RH |
1644 | nat_mask = 1UL << ia64_rse_slot_num (addr); |
1645 | } | |
1646 | ||
1647 | if (write) | |
1648 | { | |
1649 | *addr = *val; | |
1650 | if (*nat) | |
1651 | *nat_addr |= nat_mask; | |
1652 | else | |
1653 | *nat_addr &= ~nat_mask; | |
1654 | } | |
1655 | else | |
1656 | { | |
1657 | *val = *addr; | |
1658 | *nat = (*nat_addr & nat_mask) != 0; | |
1659 | } | |
1660 | } | |
1661 | \f | |
1662 | /* Get the value of register REG as saved in CONTEXT. */ | |
1663 | ||
1664 | _Unwind_Word | |
1665 | _Unwind_GetGR (struct _Unwind_Context *context, int index) | |
1666 | { | |
1667 | _Unwind_Word ret; | |
1668 | char nat; | |
1669 | ||
1670 | if (index == 1) | |
1671 | return context->gp; | |
1672 | else if (index >= 15 && index <= 18) | |
1673 | return context->eh_data[index - 15]; | |
1674 | else | |
1675 | unw_access_gr (context, index, &ret, &nat, 0); | |
1676 | ||
1677 | return ret; | |
1678 | } | |
1679 | ||
1680 | /* Overwrite the saved value for register REG in CONTEXT with VAL. */ | |
1681 | ||
1682 | void | |
1683 | _Unwind_SetGR (struct _Unwind_Context *context, int index, _Unwind_Word val) | |
1684 | { | |
1685 | char nat = 0; | |
1686 | ||
1687 | if (index == 1) | |
1688 | context->gp = val; | |
1689 | else if (index >= 15 && index <= 18) | |
1690 | context->eh_data[index - 15] = val; | |
1691 | else | |
1692 | unw_access_gr (context, index, &val, &nat, 1); | |
1693 | } | |
1694 | ||
1695 | /* Retrieve the return address for CONTEXT. */ | |
1696 | ||
1697 | inline _Unwind_Ptr | |
1698 | _Unwind_GetIP (struct _Unwind_Context *context) | |
1699 | { | |
1700 | return context->rp; | |
1701 | } | |
1702 | ||
754e45a8 JJ |
1703 | inline _Unwind_Ptr |
1704 | _Unwind_GetIPInfo (struct _Unwind_Context *context, int *ip_before_insn) | |
1705 | { | |
1706 | *ip_before_insn = 0; | |
1707 | return context->rp; | |
1708 | } | |
1709 | ||
2a1ee410 RH |
1710 | /* Overwrite the return address for CONTEXT with VAL. */ |
1711 | ||
1712 | inline void | |
1713 | _Unwind_SetIP (struct _Unwind_Context *context, _Unwind_Ptr val) | |
1714 | { | |
1715 | context->rp = val; | |
1716 | } | |
1717 | ||
1718 | void * | |
1719 | _Unwind_GetLanguageSpecificData (struct _Unwind_Context *context) | |
1720 | { | |
1721 | return context->lsda; | |
1722 | } | |
1723 | ||
1724 | _Unwind_Ptr | |
1725 | _Unwind_GetRegionStart (struct _Unwind_Context *context) | |
1726 | { | |
1727 | return context->region_start; | |
1728 | } | |
1729 | ||
5dafd282 | 1730 | void * |
5154b05d | 1731 | _Unwind_FindEnclosingFunction (void *pc) |
5dafd282 | 1732 | { |
b874a90d | 1733 | struct unw_table_entry *entp, ent; |
9e916de7 | 1734 | unw_word segment_base, gp; |
61193e7b | 1735 | |
b874a90d DR |
1736 | entp = _Unwind_FindTableEntry (pc, &segment_base, &gp, &ent); |
1737 | if (entp == NULL) | |
61193e7b RH |
1738 | return NULL; |
1739 | else | |
b874a90d | 1740 | return (void *)(segment_base + entp->start_offset); |
61193e7b RH |
1741 | } |
1742 | ||
1743 | /* Get the value of the CFA as saved in CONTEXT. In GCC/Dwarf2 parlance, | |
1744 | the CFA is the value of the stack pointer on entry; In IA-64 unwind | |
1745 | parlance, this is the PSP. */ | |
1746 | ||
1747 | _Unwind_Word | |
1748 | _Unwind_GetCFA (struct _Unwind_Context *context) | |
1749 | { | |
1750 | return (_Unwind_Ptr) context->psp; | |
5dafd282 AH |
1751 | } |
1752 | ||
bc93e287 JJ |
1753 | /* Get the value of the Backing Store Pointer as saved in CONTEXT. */ |
1754 | ||
1755 | _Unwind_Word | |
1756 | _Unwind_GetBSP (struct _Unwind_Context *context) | |
1757 | { | |
1758 | return (_Unwind_Ptr) context->bsp; | |
1759 | } | |
1760 | ||
58cd1d70 | 1761 | #include "md-unwind-support.h" |
201cdb74 RO |
1762 | |
1763 | /* By default, assume personality routine interface compatibility with | |
1764 | our expectations. */ | |
1765 | #ifndef MD_UNW_COMPATIBLE_PERSONALITY_P | |
1766 | #define MD_UNW_COMPATIBLE_PERSONALITY_P(HEADER) 1 | |
1767 | #endif | |
1768 | ||
2a1ee410 RH |
1769 | \f |
1770 | static _Unwind_Reason_Code | |
1771 | uw_frame_state_for (struct _Unwind_Context *context, _Unwind_FrameState *fs) | |
1772 | { | |
b874a90d | 1773 | struct unw_table_entry *entp, ent; |
9e916de7 | 1774 | unw_word *unw, header, length; |
2a1ee410 | 1775 | unsigned char *insn, *insn_end; |
9e916de7 | 1776 | unw_word segment_base; |
d7e60e95 | 1777 | struct unw_reg_info *r; |
2a1ee410 RH |
1778 | |
1779 | memset (fs, 0, sizeof (*fs)); | |
d7e60e95 HB |
1780 | for (r = fs->curr.reg; r < fs->curr.reg + UNW_NUM_REGS; ++r) |
1781 | r->when = UNW_WHEN_NEVER; | |
2a1ee410 RH |
1782 | context->lsda = 0; |
1783 | ||
b874a90d DR |
1784 | entp = _Unwind_FindTableEntry ((void *) context->rp, |
1785 | &segment_base, &context->gp, &ent); | |
1786 | if (entp == NULL) | |
2a1ee410 RH |
1787 | { |
1788 | /* Couldn't find unwind info for this function. Try an | |
1789 | os-specific fallback mechanism. This will necessarily | |
4d9720f0 | 1790 | not provide a personality routine or LSDA. */ |
2a1ee410 | 1791 | #ifdef MD_FALLBACK_FRAME_STATE_FOR |
8662eb14 AM |
1792 | if (MD_FALLBACK_FRAME_STATE_FOR (context, fs) == _URC_NO_REASON) |
1793 | return _URC_NO_REASON; | |
ac77b88e | 1794 | #endif |
443621af RH |
1795 | |
1796 | /* [SCRA 11.4.1] A leaf function with no memory stack, no exception | |
1797 | handlers, and which keeps the return value in B0 does not need | |
1798 | an unwind table entry. | |
1799 | ||
1800 | This can only happen in the frame after unwinding through a signal | |
897105a1 JJ |
1801 | handler. Avoid infinite looping by requiring that B0 != RP. |
1802 | RP == 0 terminates the chain. */ | |
ac77b88e EB |
1803 | if (context->br_loc[0] |
1804 | && *context->br_loc[0] != context->rp | |
897105a1 | 1805 | && context->rp != 0) |
ac77b88e EB |
1806 | goto skip_unwind_info; |
1807 | ||
8662eb14 | 1808 | return _URC_END_OF_STACK; |
2a1ee410 RH |
1809 | } |
1810 | ||
b874a90d | 1811 | context->region_start = entp->start_offset + segment_base; |
e8c89d29 JJ |
1812 | fs->when_target = ((context->rp & -16) - context->region_start) / 16 * 3 |
1813 | + (context->rp & 15); | |
2a1ee410 | 1814 | |
9e916de7 | 1815 | unw = (unw_word *) (entp->info_offset + segment_base); |
2a1ee410 RH |
1816 | header = *unw; |
1817 | length = UNW_LENGTH (header); | |
1818 | ||
b874a90d DR |
1819 | /* Some operating systems use the personality routine slot in way not |
1820 | compatible with what we expect. For instance, OpenVMS uses this slot to | |
1821 | designate "condition handlers" with very different arguments than what we | |
1822 | would be providing. Such cases are typically identified from OS specific | |
1823 | bits in the unwind information block header, and checked by the target | |
1824 | MD_UNW_COMPATIBLE_PERSONALITY_P macro. | |
1825 | ||
1826 | We just pretend there is no personality from our standpoint in such | |
1827 | situations, and expect GCC not to set the identifying bits itself so that | |
1828 | compatible personalities for GCC compiled code are called. | |
1829 | ||
1830 | Of course, this raises the question of what combinations of native/GCC | |
1831 | calls can be expected to behave properly exception handling-wise. We are | |
1832 | not to provide a magic answer here, merely to prevent crashes assuming | |
1833 | users know what they are doing. | |
1834 | ||
1835 | ??? Perhaps check UNW_VER / UNW_FLAG_OSMASK as well. */ | |
2a1ee410 | 1836 | |
b874a90d DR |
1837 | if (MD_UNW_COMPATIBLE_PERSONALITY_P (header) |
1838 | && (UNW_FLAG_EHANDLER (header) | UNW_FLAG_UHANDLER (header))) | |
2a1ee410 RH |
1839 | { |
1840 | fs->personality = | |
1841 | *(_Unwind_Personality_Fn *) (unw[length + 1] + context->gp); | |
1842 | context->lsda = unw + length + 2; | |
1843 | } | |
1844 | ||
1845 | insn = (unsigned char *) (unw + 1); | |
1846 | insn_end = (unsigned char *) (unw + 1 + length); | |
1847 | while (!fs->done && insn < insn_end) | |
1848 | insn = unw_decode (insn, fs->in_body, fs); | |
1849 | ||
72e32876 RH |
1850 | free_label_states (fs->labeled_states); |
1851 | free_state_stack (&fs->curr); | |
1852 | ||
1853 | #ifdef ENABLE_MALLOC_CHECKING | |
1854 | if (reg_state_alloced || labeled_state_alloced) | |
1855 | abort (); | |
1856 | #endif | |
1857 | ||
2a1ee410 RH |
1858 | /* If we're in the epilogue, sp has been restored and all values |
1859 | on the memory stack below psp also have been restored. */ | |
1860 | if (fs->when_target > fs->epilogue_start) | |
1861 | { | |
1862 | struct unw_reg_info *r; | |
1863 | ||
1864 | fs->curr.reg[UNW_REG_PSP].where = UNW_WHERE_NONE; | |
1865 | fs->curr.reg[UNW_REG_PSP].val = 0; | |
1866 | for (r = fs->curr.reg; r < fs->curr.reg + UNW_NUM_REGS; ++r) | |
1867 | if ((r->where == UNW_WHERE_PSPREL && r->val <= 0x10) | |
1868 | || r->where == UNW_WHERE_SPREL) | |
1869 | r->where = UNW_WHERE_NONE; | |
1870 | } | |
1871 | ||
ac77b88e EB |
1872 | skip_unwind_info: |
1873 | /* If RP didn't get saved, generate entry for the return link register. */ | |
2a1ee410 RH |
1874 | if (fs->curr.reg[UNW_REG_RP].when >= fs->when_target) |
1875 | { | |
1876 | fs->curr.reg[UNW_REG_RP].where = UNW_WHERE_BR; | |
1877 | fs->curr.reg[UNW_REG_RP].when = -1; | |
1878 | fs->curr.reg[UNW_REG_RP].val = fs->return_link_reg; | |
1879 | } | |
1880 | ||
ac77b88e EB |
1881 | /* There is a subtlety for the frame after unwinding through a signal |
1882 | handler: should we restore the cfm as usual or the pfs? We can't | |
1883 | restore both because we use br.ret to resume execution of user code. | |
1884 | For other frames the procedure is by definition non-leaf so the pfs | |
1885 | is saved and restored and thus effectively dead in the body; only | |
1886 | the cfm need therefore be restored. | |
1887 | ||
1888 | Here we have 2 cases: | |
1889 | - either the pfs is saved and restored and thus effectively dead | |
1890 | like in regular frames; then we do nothing special and restore | |
1891 | the cfm. | |
1892 | - or the pfs is not saved and thus live; but in that case the | |
1893 | procedure is necessarily leaf so the cfm is effectively dead | |
1894 | and we restore the pfs. */ | |
1895 | if (context->signal_pfs_loc) | |
1896 | { | |
1897 | if (fs->curr.reg[UNW_REG_PFS].when >= fs->when_target) | |
1898 | context->pfs_loc = context->signal_pfs_loc; | |
1899 | context->signal_pfs_loc = NULL; | |
1900 | } | |
1901 | ||
2a1ee410 RH |
1902 | return _URC_NO_REASON; |
1903 | } | |
1904 | ||
1905 | static void | |
1906 | uw_update_reg_address (struct _Unwind_Context *context, | |
1907 | _Unwind_FrameState *fs, | |
1908 | enum unw_register_index regno) | |
1909 | { | |
1910 | struct unw_reg_info *r = fs->curr.reg + regno; | |
1911 | void *addr; | |
9e916de7 | 1912 | unw_word rval; |
2a1ee410 RH |
1913 | |
1914 | if (r->where == UNW_WHERE_NONE || r->when >= fs->when_target) | |
1915 | return; | |
1916 | ||
1917 | rval = r->val; | |
1918 | switch (r->where) | |
1919 | { | |
1920 | case UNW_WHERE_GR: | |
1921 | if (rval >= 32) | |
9e916de7 | 1922 | addr = ia64_rse_skip_regs ((unw_word *) context->bsp, rval - 32); |
2a1ee410 RH |
1923 | else if (rval >= 2) |
1924 | addr = context->ireg[rval - 2].loc; | |
b80c0987 JJ |
1925 | else if (rval == 0) |
1926 | { | |
9e916de7 | 1927 | static const unw_word dummy; |
b80c0987 JJ |
1928 | addr = (void *) &dummy; |
1929 | } | |
2a1ee410 RH |
1930 | else |
1931 | abort (); | |
1932 | break; | |
1933 | ||
1934 | case UNW_WHERE_FR: | |
1935 | if (rval >= 2 && rval < 32) | |
1936 | addr = context->fr_loc[rval - 2]; | |
1937 | else | |
1938 | abort (); | |
1939 | break; | |
1940 | ||
1941 | case UNW_WHERE_BR: | |
443621af | 1942 | /* Note that while RVAL can only be 1-5 from normal descriptors, |
3950dcdf | 1943 | we can want to look at B0, B6 and B7 due to having manually unwound a |
443621af | 1944 | signal frame. */ |
3950dcdf | 1945 | if (rval < 8) |
443621af | 1946 | addr = context->br_loc[rval]; |
2a1ee410 RH |
1947 | else |
1948 | abort (); | |
1949 | break; | |
1950 | ||
1951 | case UNW_WHERE_SPREL: | |
1952 | addr = (void *)(context->sp + rval); | |
1953 | break; | |
1954 | ||
1955 | case UNW_WHERE_PSPREL: | |
1956 | addr = (void *)(context->psp + rval); | |
1957 | break; | |
1958 | ||
1959 | default: | |
1960 | abort (); | |
1961 | } | |
1962 | ||
1963 | switch (regno) | |
1964 | { | |
1965 | case UNW_REG_R2 ... UNW_REG_R31: | |
1966 | context->ireg[regno - UNW_REG_R2].loc = addr; | |
1967 | switch (r->where) | |
1968 | { | |
1969 | case UNW_WHERE_GR: | |
1970 | if (rval >= 32) | |
1971 | { | |
1972 | context->ireg[regno - UNW_REG_R2].nat.type = UNW_NAT_MEMSTK; | |
1973 | context->ireg[regno - UNW_REG_R2].nat.off | |
9e916de7 | 1974 | = context->pri_unat_loc - (unw_word *) addr; |
2a1ee410 RH |
1975 | } |
1976 | else if (rval >= 2) | |
1977 | { | |
1978 | context->ireg[regno - UNW_REG_R2].nat | |
1979 | = context->ireg[rval - 2].nat; | |
1980 | } | |
b80c0987 JJ |
1981 | else if (rval == 0) |
1982 | { | |
1983 | context->ireg[regno - UNW_REG_R2].nat.type = UNW_NAT_NONE; | |
1984 | context->ireg[regno - UNW_REG_R2].nat.off = 0; | |
1985 | } | |
2a1ee410 RH |
1986 | else |
1987 | abort (); | |
1988 | break; | |
1989 | ||
1990 | case UNW_WHERE_FR: | |
1991 | context->ireg[regno - UNW_REG_R2].nat.type = UNW_NAT_VAL; | |
1992 | context->ireg[regno - UNW_REG_R2].nat.off = 0; | |
1993 | break; | |
1994 | ||
1995 | case UNW_WHERE_BR: | |
1996 | context->ireg[regno - UNW_REG_R2].nat.type = UNW_NAT_NONE; | |
1997 | context->ireg[regno - UNW_REG_R2].nat.off = 0; | |
1998 | break; | |
1999 | ||
2000 | case UNW_WHERE_PSPREL: | |
2001 | case UNW_WHERE_SPREL: | |
2002 | context->ireg[regno - UNW_REG_R2].nat.type = UNW_NAT_MEMSTK; | |
2003 | context->ireg[regno - UNW_REG_R2].nat.off | |
9e916de7 | 2004 | = context->pri_unat_loc - (unw_word *) addr; |
2a1ee410 RH |
2005 | break; |
2006 | ||
2007 | default: | |
2008 | abort (); | |
2009 | } | |
2010 | break; | |
2011 | ||
2012 | case UNW_REG_F2 ... UNW_REG_F31: | |
2013 | context->fr_loc[regno - UNW_REG_F2] = addr; | |
2014 | break; | |
2015 | ||
2016 | case UNW_REG_B1 ... UNW_REG_B5: | |
443621af | 2017 | context->br_loc[regno - UNW_REG_B0] = addr; |
2a1ee410 RH |
2018 | break; |
2019 | ||
2020 | case UNW_REG_BSP: | |
2021 | context->bsp_loc = addr; | |
2022 | break; | |
2023 | case UNW_REG_BSPSTORE: | |
2024 | context->bspstore_loc = addr; | |
2025 | break; | |
2026 | case UNW_REG_PFS: | |
2027 | context->pfs_loc = addr; | |
2028 | break; | |
2029 | case UNW_REG_RP: | |
9e916de7 | 2030 | context->rp = *(unw_word *)addr; |
2a1ee410 RH |
2031 | break; |
2032 | case UNW_REG_UNAT: | |
2033 | context->unat_loc = addr; | |
2034 | break; | |
2035 | case UNW_REG_PR: | |
9e916de7 | 2036 | context->pr = *(unw_word *) addr; |
2a1ee410 RH |
2037 | break; |
2038 | case UNW_REG_LC: | |
2039 | context->lc_loc = addr; | |
2040 | break; | |
2041 | case UNW_REG_FPSR: | |
2042 | context->fpsr_loc = addr; | |
2043 | break; | |
2044 | ||
2045 | case UNW_REG_PSP: | |
9e916de7 | 2046 | context->psp = *(unw_word *)addr; |
2a1ee410 RH |
2047 | break; |
2048 | ||
72e32876 | 2049 | default: |
2a1ee410 RH |
2050 | abort (); |
2051 | } | |
2052 | } | |
2053 | ||
2054 | static void | |
2055 | uw_update_context (struct _Unwind_Context *context, _Unwind_FrameState *fs) | |
2056 | { | |
9e916de7 | 2057 | int i; |
2a1ee410 | 2058 | |
3950dcdf JJ |
2059 | #ifdef MD_HANDLE_UNWABI |
2060 | MD_HANDLE_UNWABI (context, fs); | |
2061 | #endif | |
2062 | ||
2a1ee410 RH |
2063 | context->sp = context->psp; |
2064 | ||
2065 | /* First, set PSP. Subsequent instructions may depend on this value. */ | |
2066 | if (fs->when_target > fs->curr.reg[UNW_REG_PSP].when) | |
2067 | { | |
2068 | if (fs->curr.reg[UNW_REG_PSP].where == UNW_WHERE_NONE) | |
2069 | context->psp = context->psp + fs->curr.reg[UNW_REG_PSP].val; | |
2070 | else | |
2071 | uw_update_reg_address (context, fs, UNW_REG_PSP); | |
2072 | } | |
2073 | ||
2074 | /* Determine the location of the primary UNaT. */ | |
2075 | { | |
2076 | int i; | |
2077 | if (fs->when_target < fs->curr.reg[UNW_REG_PRI_UNAT_GR].when) | |
2078 | i = UNW_REG_PRI_UNAT_MEM; | |
2079 | else if (fs->when_target < fs->curr.reg[UNW_REG_PRI_UNAT_MEM].when) | |
2080 | i = UNW_REG_PRI_UNAT_GR; | |
2081 | else if (fs->curr.reg[UNW_REG_PRI_UNAT_MEM].when | |
2082 | > fs->curr.reg[UNW_REG_PRI_UNAT_GR].when) | |
2083 | i = UNW_REG_PRI_UNAT_MEM; | |
2084 | else | |
2085 | i = UNW_REG_PRI_UNAT_GR; | |
2086 | uw_update_reg_address (context, fs, i); | |
2087 | } | |
2088 | ||
2089 | /* Compute the addresses of all registers saved in this frame. */ | |
2090 | for (i = UNW_REG_BSP; i < UNW_NUM_REGS; ++i) | |
2091 | uw_update_reg_address (context, fs, i); | |
2092 | ||
2093 | /* Unwind BSP for the local registers allocated this frame. */ | |
2094 | /* ??? What to do with stored BSP or BSPSTORE registers. */ | |
d7e60e95 HB |
2095 | /* We assert that we are either at a call site, or we have |
2096 | just unwound through a signal frame. In either case | |
2097 | pfs_loc is valid. */ | |
2098 | if (!(fs -> no_reg_stack_frame)) | |
2a1ee410 | 2099 | { |
9e916de7 TG |
2100 | unw_word pfs = *context->pfs_loc; |
2101 | unw_word sol = (pfs >> 7) & 0x7f; | |
2102 | context->bsp = (unw_word) | |
2103 | ia64_rse_skip_regs ((unw_word *) context->bsp, -sol); | |
2a1ee410 RH |
2104 | } |
2105 | } | |
2106 | ||
60aef23e DJ |
2107 | static void |
2108 | uw_advance_context (struct _Unwind_Context *context, _Unwind_FrameState *fs) | |
2109 | { | |
2110 | uw_update_context (context, fs); | |
2111 | } | |
2112 | ||
2a1ee410 | 2113 | /* Fill in CONTEXT for top-of-stack. The only valid registers at this |
a58b0342 | 2114 | level will be the return address and the CFA. Note that CFA = SP+16. */ |
2a1ee410 | 2115 | |
4d9720f0 HB |
2116 | #define uw_init_context(CONTEXT) \ |
2117 | do { \ | |
2118 | /* ??? There is a whole lot o code in uw_install_context that \ | |
2119 | tries to avoid spilling the entire machine state here. We \ | |
2120 | should try to make that work again. */ \ | |
2121 | __builtin_unwind_init(); \ | |
2122 | uw_init_context_1 (CONTEXT, __builtin_ia64_bsp ()); \ | |
2123 | } while (0) | |
2a1ee410 | 2124 | |
e5b258a4 | 2125 | static void __attribute__((noinline)) |
4d9720f0 | 2126 | uw_init_context_1 (struct _Unwind_Context *context, void *bsp) |
2a1ee410 RH |
2127 | { |
2128 | void *rp = __builtin_extract_return_addr (__builtin_return_address (0)); | |
ed168e45 | 2129 | /* Set psp to the caller's stack pointer. */ |
a58b0342 | 2130 | void *psp = __builtin_dwarf_cfa () - 16; |
2a1ee410 | 2131 | _Unwind_FrameState fs; |
9e916de7 | 2132 | unw_word rnat, tmp1, tmp2; |
e8c89d29 JJ |
2133 | |
2134 | /* Flush the register stack to memory so that we can access it. | |
2135 | Get rse nat collection for the last incomplete rbs chunk of | |
2136 | registers at the same time. For this RSE needs to be turned | |
2137 | into the mandatory only mode. */ | |
2138 | asm ("mov.m %1 = ar.rsc;;\n\t" | |
2139 | "and %2 = 0x1c, %1;;\n\t" | |
2140 | "mov.m ar.rsc = %2;;\n\t" | |
2141 | "flushrs;;\n\t" | |
2142 | "mov.m %0 = ar.rnat;;\n\t" | |
2143 | "mov.m ar.rsc = %1\n\t" | |
2144 | : "=r" (rnat), "=r" (tmp1), "=r" (tmp2)); | |
2a1ee410 RH |
2145 | |
2146 | memset (context, 0, sizeof (struct _Unwind_Context)); | |
9e916de7 | 2147 | context->bsp = (unw_word) bsp; |
e8c89d29 JJ |
2148 | /* Set context->regstk_top to lowest rbs address which will use |
2149 | context->rnat collection. */ | |
2150 | context->regstk_top = context->bsp & ~0x1ffULL; | |
2151 | context->rnat = rnat; | |
9e916de7 TG |
2152 | context->psp = (unw_word) psp; |
2153 | context->rp = (unw_word) rp; | |
4d9720f0 | 2154 | asm ("mov %0 = sp" : "=r" (context->sp)); |
2a1ee410 | 2155 | asm ("mov %0 = pr" : "=r" (context->pr)); |
4d9720f0 | 2156 | context->pri_unat_loc = &context->initial_unat; /* ??? */ |
2a1ee410 RH |
2157 | |
2158 | if (uw_frame_state_for (context, &fs) != _URC_NO_REASON) | |
2159 | abort (); | |
2160 | ||
2a1ee410 RH |
2161 | uw_update_context (context, &fs); |
2162 | } | |
2163 | ||
112cdef5 | 2164 | /* Install (i.e. longjmp to) the contents of TARGET. */ |
2a1ee410 RH |
2165 | |
2166 | static void __attribute__((noreturn)) | |
2167 | uw_install_context (struct _Unwind_Context *current __attribute__((unused)), | |
1ebafce0 IT |
2168 | struct _Unwind_Context *target, |
2169 | unsigned long frames __attribute__((unused))) | |
2a1ee410 | 2170 | { |
9e916de7 | 2171 | unw_word ireg_buf[4], ireg_nat = 0, ireg_pr = 0; |
9a9dcce8 | 2172 | unw_word saved_lc; |
9e916de7 | 2173 | int i; |
2a1ee410 | 2174 | |
9a9dcce8 EB |
2175 | /* ??? LC is a fixed register so the call to __builtin_unwind_init in |
2176 | uw_init_context doesn't cause it to be saved. In case it isn't in | |
2177 | the user frames either, we need to manually do so here, lest it be | |
2178 | clobbered by the loop just below. */ | |
2179 | if (target->lc_loc == NULL) | |
2180 | { | |
2181 | register unw_word lc asm ("ar.lc"); | |
2182 | saved_lc = lc; | |
2183 | target->lc_loc = &saved_lc; | |
2184 | } | |
2185 | ||
2a1ee410 RH |
2186 | /* Copy integer register data from the target context to a |
2187 | temporary buffer. Do this so that we can frob AR.UNAT | |
2188 | to get the NaT bits for these registers set properly. */ | |
2189 | for (i = 4; i <= 7; ++i) | |
2190 | { | |
2191 | char nat; | |
2192 | void *t = target->ireg[i - 2].loc; | |
2193 | if (t) | |
2194 | { | |
2195 | unw_access_gr (target, i, &ireg_buf[i - 4], &nat, 0); | |
9e916de7 | 2196 | ireg_nat |= (unw_word)nat << (((size_t)&ireg_buf[i - 4] >> 3) & 0x3f); |
2a1ee410 RH |
2197 | /* Set p6 - p9. */ |
2198 | ireg_pr |= 4L << i; | |
2199 | } | |
2200 | } | |
2201 | ||
2202 | /* The value in uc_bsp that we've computed is that for the | |
2203 | target function. The value that we install below will be | |
2204 | adjusted by the BR.RET instruction based on the contents | |
2205 | of AR.PFS. So we must unadjust that here. */ | |
9e916de7 TG |
2206 | target->bsp = (unw_word) |
2207 | ia64_rse_skip_regs ((unw_word *)target->bsp, | |
4d9720f0 | 2208 | (*target->pfs_loc >> 7) & 0x7f); |
2a1ee410 | 2209 | |
e8c89d29 | 2210 | if (target->bsp < target->regstk_top) |
9e916de7 | 2211 | target->rnat = *ia64_rse_rnat_addr ((unw_word *) target->bsp); |
e8c89d29 | 2212 | |
2a1ee410 RH |
2213 | /* Provide assembly with the offsets into the _Unwind_Context. */ |
2214 | asm volatile ("uc_rnat = %0" | |
2215 | : : "i"(offsetof (struct _Unwind_Context, rnat))); | |
2216 | asm volatile ("uc_bsp = %0" | |
2217 | : : "i"(offsetof (struct _Unwind_Context, bsp))); | |
2218 | asm volatile ("uc_psp = %0" | |
2219 | : : "i"(offsetof (struct _Unwind_Context, psp))); | |
2220 | asm volatile ("uc_rp = %0" | |
2221 | : : "i"(offsetof (struct _Unwind_Context, rp))); | |
2222 | asm volatile ("uc_pr = %0" | |
2223 | : : "i"(offsetof (struct _Unwind_Context, pr))); | |
2224 | asm volatile ("uc_gp = %0" | |
2225 | : : "i"(offsetof (struct _Unwind_Context, gp))); | |
2226 | asm volatile ("uc_pfs_loc = %0" | |
2227 | : : "i"(offsetof (struct _Unwind_Context, pfs_loc))); | |
2228 | asm volatile ("uc_unat_loc = %0" | |
2229 | : : "i"(offsetof (struct _Unwind_Context, unat_loc))); | |
2230 | asm volatile ("uc_lc_loc = %0" | |
2231 | : : "i"(offsetof (struct _Unwind_Context, lc_loc))); | |
2232 | asm volatile ("uc_fpsr_loc = %0" | |
2233 | : : "i"(offsetof (struct _Unwind_Context, fpsr_loc))); | |
2234 | asm volatile ("uc_eh_data = %0" | |
2235 | : : "i"(offsetof (struct _Unwind_Context, eh_data))); | |
2236 | asm volatile ("uc_br_loc = %0" | |
2237 | : : "i"(offsetof (struct _Unwind_Context, br_loc))); | |
2238 | asm volatile ("uc_fr_loc = %0" | |
2239 | : : "i"(offsetof (struct _Unwind_Context, fr_loc))); | |
2240 | ||
2241 | asm volatile ( | |
2242 | /* Load up call-saved non-window integer registers from ireg_buf. */ | |
2243 | "add r20 = 8, %1 \n\t" | |
2244 | "mov ar.unat = %2 \n\t" | |
2245 | "mov pr = %3, 0x3c0 \n\t" | |
2246 | ";; \n\t" | |
2247 | "(p6) ld8.fill r4 = [%1] \n\t" | |
2248 | "(p7) ld8.fill r5 = [r20] \n\t" | |
3950dcdf | 2249 | "add r21 = uc_br_loc + 16, %0 \n\t" |
2a1ee410 RH |
2250 | "adds %1 = 16, %1 \n\t" |
2251 | "adds r20 = 16, r20 \n\t" | |
2252 | ";; \n\t" | |
2253 | "(p8) ld8.fill r6 = [%1] \n\t" | |
2254 | "(p9) ld8.fill r7 = [r20] \n\t" | |
3950dcdf | 2255 | "add r20 = uc_br_loc + 8, %0 \n\t" |
2a1ee410 RH |
2256 | ";; \n\t" |
2257 | /* Load up call-saved branch registers. */ | |
2258 | "ld8 r22 = [r20], 16 \n\t" | |
2259 | "ld8 r23 = [r21], 16 \n\t" | |
2260 | ";; \n\t" | |
2261 | "ld8 r24 = [r20], 16 \n\t" | |
3950dcdf | 2262 | "ld8 r25 = [r21], uc_fr_loc - (uc_br_loc + 32)\n\t" |
2a1ee410 | 2263 | ";; \n\t" |
3950dcdf | 2264 | "ld8 r26 = [r20], uc_fr_loc + 8 - (uc_br_loc + 40)\n\t" |
2a1ee410 RH |
2265 | "ld8 r27 = [r21], 24 \n\t" |
2266 | "cmp.ne p6, p0 = r0, r22 \n\t" | |
2267 | ";; \n\t" | |
2268 | "ld8 r28 = [r20], 8 \n\t" | |
2269 | "(p6) ld8 r22 = [r22] \n\t" | |
2270 | "cmp.ne p7, p0 = r0, r23 \n\t" | |
2271 | ";; \n\t" | |
2272 | "(p7) ld8 r23 = [r23] \n\t" | |
2273 | "cmp.ne p8, p0 = r0, r24 \n\t" | |
2274 | ";; \n\t" | |
2275 | "(p8) ld8 r24 = [r24] \n\t" | |
2276 | "(p6) mov b1 = r22 \n\t" | |
2277 | "cmp.ne p9, p0 = r0, r25 \n\t" | |
2278 | ";; \n\t" | |
2279 | "(p9) ld8 r25 = [r25] \n\t" | |
2280 | "(p7) mov b2 = r23 \n\t" | |
2281 | "cmp.ne p6, p0 = r0, r26 \n\t" | |
2282 | ";; \n\t" | |
2283 | "(p6) ld8 r26 = [r26] \n\t" | |
2284 | "(p8) mov b3 = r24 \n\t" | |
2285 | "cmp.ne p7, p0 = r0, r27 \n\t" | |
2286 | ";; \n\t" | |
2287 | /* Load up call-saved fp registers. */ | |
2288 | "(p7) ldf.fill f2 = [r27] \n\t" | |
2289 | "(p9) mov b4 = r25 \n\t" | |
2290 | "cmp.ne p8, p0 = r0, r28 \n\t" | |
2291 | ";; \n\t" | |
2292 | "(p8) ldf.fill f3 = [r28] \n\t" | |
2293 | "(p6) mov b5 = r26 \n\t" | |
2294 | ";; \n\t" | |
2295 | "ld8 r29 = [r20], 16*8 - 4*8 \n\t" | |
2296 | "ld8 r30 = [r21], 17*8 - 5*8 \n\t" | |
2297 | ";; \n\t" | |
2298 | "ld8 r22 = [r20], 16 \n\t" | |
2299 | "ld8 r23 = [r21], 16 \n\t" | |
2300 | ";; \n\t" | |
2301 | "ld8 r24 = [r20], 16 \n\t" | |
2302 | "ld8 r25 = [r21] \n\t" | |
2303 | "cmp.ne p6, p0 = r0, r29 \n\t" | |
2304 | ";; \n\t" | |
2305 | "ld8 r26 = [r20], 8 \n\t" | |
2306 | "(p6) ldf.fill f4 = [r29] \n\t" | |
2307 | "cmp.ne p7, p0 = r0, r30 \n\t" | |
2308 | ";; \n\t" | |
2309 | "ld8 r27 = [r20], 8 \n\t" | |
2310 | "(p7) ldf.fill f5 = [r30] \n\t" | |
2311 | "cmp.ne p6, p0 = r0, r22 \n\t" | |
2312 | ";; \n\t" | |
2313 | "ld8 r28 = [r20], 8 \n\t" | |
2314 | "(p6) ldf.fill f16 = [r22] \n\t" | |
2315 | "cmp.ne p7, p0 = r0, r23 \n\t" | |
2316 | ";; \n\t" | |
2317 | "ld8 r29 = [r20], 8 \n\t" | |
2318 | "(p7) ldf.fill f17 = [r23] \n\t" | |
2319 | "cmp.ne p6, p0 = r0, r24 \n\t" | |
2320 | ";; \n\t" | |
2321 | "ld8 r22 = [r20], 8 \n\t" | |
2322 | "(p6) ldf.fill f18 = [r24] \n\t" | |
2323 | "cmp.ne p7, p0 = r0, r25 \n\t" | |
2324 | ";; \n\t" | |
2325 | "ld8 r23 = [r20], 8 \n\t" | |
2326 | "(p7) ldf.fill f19 = [r25] \n\t" | |
2327 | "cmp.ne p6, p0 = r0, r26 \n\t" | |
2328 | ";; \n\t" | |
2329 | "ld8 r24 = [r20], 8 \n\t" | |
2330 | "(p6) ldf.fill f20 = [r26] \n\t" | |
2331 | "cmp.ne p7, p0 = r0, r27 \n\t" | |
2332 | ";; \n\t" | |
2333 | "ld8 r25 = [r20], 8 \n\t" | |
2334 | "(p7) ldf.fill f21 = [r27] \n\t" | |
2335 | "cmp.ne p6, p0 = r0, r28 \n\t" | |
2336 | ";; \n\t" | |
2337 | "ld8 r26 = [r20], 8 \n\t" | |
2338 | "(p6) ldf.fill f22 = [r28] \n\t" | |
2339 | "cmp.ne p7, p0 = r0, r29 \n\t" | |
2340 | ";; \n\t" | |
43a07983 JW |
2341 | "ld8 r27 = [r20], 8 \n\t" |
2342 | ";; \n\t" | |
2a1ee410 RH |
2343 | "ld8 r28 = [r20], 8 \n\t" |
2344 | "(p7) ldf.fill f23 = [r29] \n\t" | |
2345 | "cmp.ne p6, p0 = r0, r22 \n\t" | |
2346 | ";; \n\t" | |
2347 | "ld8 r29 = [r20], 8 \n\t" | |
2348 | "(p6) ldf.fill f24 = [r22] \n\t" | |
2349 | "cmp.ne p7, p0 = r0, r23 \n\t" | |
2350 | ";; \n\t" | |
2351 | "(p7) ldf.fill f25 = [r23] \n\t" | |
2352 | "cmp.ne p6, p0 = r0, r24 \n\t" | |
2353 | "cmp.ne p7, p0 = r0, r25 \n\t" | |
2354 | ";; \n\t" | |
2355 | "(p6) ldf.fill f26 = [r24] \n\t" | |
2356 | "(p7) ldf.fill f27 = [r25] \n\t" | |
2357 | "cmp.ne p6, p0 = r0, r26 \n\t" | |
2358 | ";; \n\t" | |
2359 | "(p6) ldf.fill f28 = [r26] \n\t" | |
2360 | "cmp.ne p7, p0 = r0, r27 \n\t" | |
2361 | "cmp.ne p6, p0 = r0, r28 \n\t" | |
2362 | ";; \n\t" | |
2363 | "(p7) ldf.fill f29 = [r27] \n\t" | |
2364 | "(p6) ldf.fill f30 = [r28] \n\t" | |
2365 | "cmp.ne p7, p0 = r0, r29 \n\t" | |
2366 | ";; \n\t" | |
2367 | "(p7) ldf.fill f31 = [r29] \n\t" | |
2368 | "add r20 = uc_rnat, %0 \n\t" | |
2369 | "add r21 = uc_bsp, %0 \n\t" | |
2370 | ";; \n\t" | |
2371 | /* Load the balance of the thread state from the context. */ | |
2372 | "ld8 r22 = [r20], uc_psp - uc_rnat \n\t" | |
2373 | "ld8 r23 = [r21], uc_gp - uc_bsp \n\t" | |
2374 | ";; \n\t" | |
2375 | "ld8 r24 = [r20], uc_pfs_loc - uc_psp \n\t" | |
2376 | "ld8 r1 = [r21], uc_rp - uc_gp \n\t" | |
2377 | ";; \n\t" | |
2378 | "ld8 r25 = [r20], uc_unat_loc - uc_pfs_loc\n\t" | |
2379 | "ld8 r26 = [r21], uc_pr - uc_rp \n\t" | |
2380 | ";; \n\t" | |
2381 | "ld8 r27 = [r20], uc_lc_loc - uc_unat_loc\n\t" | |
2382 | "ld8 r28 = [r21], uc_fpsr_loc - uc_pr \n\t" | |
2383 | ";; \n\t" | |
2384 | "ld8 r29 = [r20], uc_eh_data - uc_lc_loc\n\t" | |
2385 | "ld8 r30 = [r21], uc_eh_data + 8 - uc_fpsr_loc\n\t" | |
2386 | ";; \n\t" | |
2387 | /* Load data for the exception handler. */ | |
2388 | "ld8 r15 = [r20], 16 \n\t" | |
2389 | "ld8 r16 = [r21], 16 \n\t" | |
2390 | ";; \n\t" | |
2391 | "ld8 r17 = [r20] \n\t" | |
2392 | "ld8 r18 = [r21] \n\t" | |
2393 | ";; \n\t" | |
2394 | /* Install the balance of the thread state loaded above. */ | |
2395 | "cmp.ne p6, p0 = r0, r25 \n\t" | |
2396 | "cmp.ne p7, p0 = r0, r27 \n\t" | |
2397 | ";; \n\t" | |
2398 | "(p6) ld8 r25 = [r25] \n\t" | |
2399 | "(p7) ld8 r27 = [r27] \n\t" | |
2400 | ";; \n\t" | |
2401 | "(p7) mov.m ar.unat = r27 \n\t" | |
2402 | "(p6) mov.i ar.pfs = r25 \n\t" | |
2403 | "cmp.ne p9, p0 = r0, r29 \n\t" | |
2404 | ";; \n\t" | |
2405 | "(p9) ld8 r29 = [r29] \n\t" | |
2406 | "cmp.ne p6, p0 = r0, r30 \n\t" | |
2407 | ";; \n\t" | |
2408 | "(p6) ld8 r30 = [r30] \n\t" | |
2409 | /* Don't clobber p6-p9, which are in use at present. */ | |
2410 | "mov pr = r28, ~0x3c0 \n\t" | |
2411 | "(p9) mov.i ar.lc = r29 \n\t" | |
2412 | ";; \n\t" | |
2413 | "mov.m r25 = ar.rsc \n\t" | |
3950dcdf | 2414 | "(p6) mov.m ar.fpsr = r30 \n\t" |
2a1ee410 | 2415 | ";; \n\t" |
e8c89d29 | 2416 | "and r29 = 0x1c, r25 \n\t" |
2a1ee410 RH |
2417 | "mov b0 = r26 \n\t" |
2418 | ";; \n\t" | |
e8c89d29 | 2419 | "mov.m ar.rsc = r29 \n\t" |
2a1ee410 RH |
2420 | ";; \n\t" |
2421 | /* This must be done before setting AR.BSPSTORE, otherwise | |
2422 | AR.BSP will be initialized with a random displacement | |
2423 | below the value we want, based on the current number of | |
2424 | dirty stacked registers. */ | |
2425 | "loadrs \n\t" | |
2426 | "invala \n\t" | |
2427 | ";; \n\t" | |
2428 | "mov.m ar.bspstore = r23 \n\t" | |
2429 | ";; \n\t" | |
2a1ee410 RH |
2430 | "mov.m ar.rnat = r22 \n\t" |
2431 | ";; \n\t" | |
2432 | "mov.m ar.rsc = r25 \n\t" | |
2433 | "mov sp = r24 \n\t" | |
2434 | "br.ret.sptk.few b0" | |
2435 | : : "r"(target), "r"(ireg_buf), "r"(ireg_nat), "r"(ireg_pr) | |
2436 | : "r15", "r16", "r17", "r18", "r20", "r21", "r22", | |
2437 | "r23", "r24", "r25", "r26", "r27", "r28", "r29", | |
2438 | "r30", "r31"); | |
2439 | /* NOTREACHED */ | |
2440 | while (1); | |
2441 | } | |
2442 | ||
2443 | static inline _Unwind_Ptr | |
2444 | uw_identify_context (struct _Unwind_Context *context) | |
2445 | { | |
2446 | return _Unwind_GetIP (context); | |
2447 | } | |
2448 | ||
2449 | #include "unwind.inc" | |
443728bb L |
2450 | |
2451 | #if defined (USE_GAS_SYMVER) && defined (SHARED) && defined (USE_LIBUNWIND_EXCEPTIONS) | |
2452 | alias (_Unwind_Backtrace); | |
2453 | alias (_Unwind_DeleteException); | |
2454 | alias (_Unwind_FindEnclosingFunction); | |
443728bb L |
2455 | alias (_Unwind_ForcedUnwind); |
2456 | alias (_Unwind_GetBSP); | |
2457 | alias (_Unwind_GetCFA); | |
2458 | alias (_Unwind_GetGR); | |
2459 | alias (_Unwind_GetIP); | |
2460 | alias (_Unwind_GetLanguageSpecificData); | |
2461 | alias (_Unwind_GetRegionStart); | |
2462 | alias (_Unwind_RaiseException); | |
2463 | alias (_Unwind_Resume); | |
2464 | alias (_Unwind_Resume_or_Rethrow); | |
2465 | alias (_Unwind_SetGR); | |
2466 | alias (_Unwind_SetIP); | |
2467 | #endif | |
2468 | ||
2a1ee410 | 2469 | #endif |